Tải xuống miễn phí C�y Th?y Sinh H?c Vi?n Khan Biểu tượng

Bộ sưu tập

Bằng cách tải xuống cho bạn các biểu tượng Vector Logo, bạn đã đồng ý với các điều khoản sử dụng của chúng tôi.

Minh Hoạ Vector Vui NhộnChọn và tải xuống các hình minh họa vector mới nhấtXem tất cả

Tải xuống hmb - Logo Vector hmb
hmb Logo vector
- Like
- Like
hmb
Logo

Like
164

Like
78.8k
Tải xuống henri caffe - Logo Vector henri caffe
henri caffe Logo vector
- Like
- Like
henri caffe
Logo

Like
613

Like
79.2k
Tải xuống hyva ika - Logo Vector hyva ika
hyva ika Logo vector
- Like
- Like
hyva ika
Logo

Like
748

Like
66.2k
Tải xuống ?i?m cao - Logo Vector ?i?m cao
?i?m cao Logo vector
- Like
- Like
?i?m cao
Logo

Like
353

Like
60.6k
Tải xuống kh?n lau em b� huggies - Logo Vector kh?n lau em b� huggies
kh?n lau em b� huggies Logo vector
- Like
- Like
kh?n lau em b� huggies
Logo

Like
635

Like
34.5k
Tải xuống harol - Logo Vector harol
harol Logo vector
- Like
- Like
harol
Logo

Like
286

Like
66.8k
Tải xuống r�o c?n 1 - Logo Vector r�o c?n 1
r�o c?n 1 Logo vector
- Like
- Like
r�o c?n 1
Logo

Like
170

Like
14.6k
Tải xuống heklia - Logo Vector heklia
heklia Logo vector
- Like
- Like
heklia
Logo

Like
556

Like
61.2k
Tải xuống d?ch v? d?t haniel - Logo Vector d?ch v? d?t haniel
d?ch v? d?t haniel Logo vector
- Like
- Like
d?ch v? d?t haniel
Logo

Like
597

Like
45.4k
Tải xuống nh� ngh? - Logo Vector nh� ngh?
nh� ngh? Logo vector
- Like
- Like
nh� ngh?
Logo

Like
456

Like
63.4k
Tải xuống honderd jaar luchtvaart - Logo Vector honderd jaar luchtvaart
honderd jaar luchtvaart Logo vector
- Like
- Like
honderd jaar luchtvaart
Logo

Like
595

Like
67.9k
Tải xuống humber - Logo Vector humber
humber Logo vector
- Like
- Like
humber
Logo

Like
555

Like
67.8k

<svg height="2500" viewBox="0 0 367.3 594.7" width="1544" xmlns="http://www.w3.org/2000/svg"><path d="m360.7 285.8c-41.1-28.6-115.3 51.3-132.2 43s-27.5 4.3-27.5 4.3l-1 13.3c6.5 2.7 13.6 3 21.2 1.8l-12.4 56.4s5.5 88.1 27.8 47.2c2.3-4.2 4.9-7.9 7.6-11.1-20.1-12.6-43.6-36.8-21-69.6 3.5-5.1 7.2-9.9 11-14.5.3-.4.6-.7.9-1.1.4-.4.7-.8 1.1-1.3l.1-.1c37.8-46.5 75.8-60 94.5-52.7 8.8 3.4 18.7-6.8 25.6 0 4.9 4.9-3.4 9.2-3.4 9.2 12.8.9 20.5-16 7.7-24.8z" fill="#8dd4f0"/><path d="m235.1 355.4c-.3.4-.6.7-.9 1.1.7-.8 1.3-1.6 1.9-2.4-.3.5-.6.8-1 1.3z" fill="#87b3e0"/><path d="m356.3 301.3c-6.8-6.8-16.7 3.4-25.6 0-12.9-5-35-.1-59.9 18.7-28 21.3-33.2 22.5-58.9 20.2-20.3-1.9 1 26 9.7 33.3-19.7 31.5 3.1 48.6 22.7 60.9 16.3-27.6 48.2-14.3 48.2-14.3-22.1-39 37.2-53.3 37.2-53.3-5-3.9-9-8.2-12-12.7-15.8-23.7-5.6-52.6 10.8-49.9.7.1 1.4.3 2.2.5 3.4 1.3 6.9 2.6 10.8.6 5.7-2.9 10.9-2.3 12.6-.1.9 1.1.9 2.6-.3 4.2-.2.2-.4.4-.5.6-.1.1-.2.3-.4.4-.1 0 8.2-4.2 3.4-9.1z" fill="#6786c4"/><path d="m3.4 352.9c31.8-43.5 135.2 11.8 149.5-2.6s29.4-5.3 29.4-5.3l5.7 13.2c-5.6 5-12.8 7.8-20.9 9.2l32.4 53s25.3 91.5-11.7 57.8c-3.8-3.5-7.7-6.3-11.6-8.6 16-19.8 31.5-52.7-3-78.1-5.4-4-10.8-7.6-16.3-10.9-.4-.3-.8-.6-1.3-.8l-1.5-.9s-.1 0-.1-.1c-54.7-34-98.1-34.4-114.5-20.5-7.8 6.6-21.4-.4-26 9-3.3 6.7 6.7 8.1 6.7 8.1-13 5.4-26.7-9.1-16.8-22.5z" fill="#8dd4f0"/><path d="m154 378.7s-.1 0-.1-.1c0 .1.1.1.1.1zm1.5.9c.5.3.8.6 1.3.8-.9-.6-1.9-1.2-2.8-1.8.5.4 1 .7 1.5 1z" fill="#87b3e0"/><path d="m67 371.8c21.9 1.2 43.5 6.4 65.3 9 15.7 1.8 31.4 3.2 47.2 4.6 5.8-14.2 10.6-36.6-5.6-29.2-25.3 11.4-31.1 11.9-67 .1-31.9-10.4-56.1-7.7-67.5 1.9-7.8 6.6-21.4-.4-26 9-3.3 6.7 6.7 8.1 6.7 8.1-.2-.1-.3-.2-.5-.3-.3-.1-.5-.3-.8-.5-1.8-1.3-2.3-2.8-1.8-4.2 1-2.8 6-5.2 12.8-4.3 4.6.6 7.7-1.9 10.7-4.4.7-.5 1.3-.9 2-1.3 8.6-4.6 18.4.9 24.5 11.5z" fill="#6786c4"/><path d="m329.7 366.8s-56.9-16.3-103.9 2.8c0 0 42.1 2.2 66.6 50.5 0 0-20.1-34.8 37.3-53.3z" fill="#5273b8"/><path d="m189.8 15.9c-37.2 14.1-54.8 92.7-37.6 149.5 2-2.4 8.9-5.1 11.1-8.1 15.1-21.1 47 11.9 47 11.9-16.5-16.6-28.3-65.5-20.5-101.2 11.9-54.6 63.7-35 63.7-35s-18.6-34.2-63.7-17.1zm-51.6 176.7c4.6 0 0 0 0-4.7 0-1 .5-2 1.3-3.1l-5.8 3.4c1.5 2.7 3 4.4 4.5 4.4z" fill="#6786c4"/><path d="m159.6 172.9c-.9-2.5-1.7-5-2.5-7.6-8.8 10.8-15.1 15.8-17.6 19.3z" fill="#6786c4"/><path d="m203.2 2.4c-46.2 0-73.9 71.6-73.9 71.6s-4.7 69.9-2.8 86.3c1.3 11.1 4.1 21.9 7.2 27.8l5.8-3.4c2.6-3.5 8.9-8.5 17.6-19.3-17.2-56.7-2.5-133.2 34.7-147.4 45.1-17.1 61.6 14.9 61.6 14.9s-13.7-30.5-50.2-30.5z" fill="#5273b8"/><path d="m246.4 437.3-47.8 39.9c10.4 10.4.5 11.9 3.9 20.4 10.8 27.3-9.3 32.8-15 33.8 2.6 0 11.5 2.4 21.9 8.7 18.3 11 22.9 29.3 22.9 29.3 4.7-15.3 20.7-8.6 20.7-8.6-6.6-10.6.8-13.6.8-13.6-36.1-9.2-36.2-21.7.1-58s-7.5-51.9-7.5-51.9z" fill="#6786c4"/><path d="m135.8 296.8c-11.3 1.9-27.6 8.4-15 30 1.2-4.8 2.7-9.5 4.3-13.4 1.4-3.6 5.8-10 10.7-16.6z" fill="#aed9f1"/><path d="m178.2 361.1c4.9-31.5 22.2-32.1 47.6-8.2-.1-.1-.2-.2-.2-.3-25-25-26.6-34.4-12.8-55l-29.5-3.5-19.8 1.9h-18.5s-4 0-9.1.8c-4.9 6.6-9.3 13-10.7 16.7-1.6 3.9-3.1 8.6-4.3 13.4.3.6.6 1.1 1 1.7 20.8 33 44.4-23.1 49.6 22.2 3.7 32.5-17.9 58.5-17.9 58.5s19.7-16.3 24.6-48.2z" fill="#6786c4"/><path d="m103.9 196.2s-35.3-57.3 25.1-88.1c0 0-46.7 32.5-14 80.1" fill="#8dd4f0"/><path d="m126.6 136.5c-6-16.5 2.3-28.4 2.3-28.4-48.3 34.9-15.5 77.9-15.5 77.9 7 10.2 12.9 13.9 18 13.8-5.4-21-8.5-41.7-4.8-63.3z" fill="#6786c4"/><path d="m138.2 181.2 19.4 4.3c24-67.1 104.5-48.2 104.5-48.2-91.2-33-123.9 43.9-123.9 43.9z" fill="#8dd4f0"/><path d="m203.2 6.6c36.8-2.2 50.3 26.3 50.3 26.3-20.9-48.2-91.3-44.3-122.5 17.5-31.2 61.9-4.1 120.8-28.2 144.8-25.6 25.6-46.9 40.5-39.8 85.8s53.4 68.9 76.7 45.6c20.1-20.1 39-24.6 48.8-19.8 8.7 4.6 15.9 1.3 21.9-6.2 14.6-19.4 34.1-52.5 29.6-87.5-6.2-48.3-69.2-50.6-101.9-31.9-26.6-124 32.4-172.6 65.1-174.6z" fill="#8dd4f0"/><path d="m228.4 271.8c-11.5 22.9-29.6 36.4-45.7 33.4v14.1c3.1 1.1 11.8 7.5 12.3 7.5s17.4 10.5 17.4 10.5-6.6-14.4-.2-29.6c5.1-12.1 12.5-28 16.2-35.9z" fill="#6786c4"/><path d="m202.5 331.7s.2.1.4.4c4.9 1.2-.4-.4-.4-.4z" fill="#87b3e0"/><path d="m246.1 424.2h-5c18.7-51.3-40.4-94.4-52.4-85.7l.4-2.8c-4.5 3.4-8.1 10.4-10.8 21.2-8.5 33.5-24.8 52.3-24.8 52.3-29.7 0-25 15.7-51.9 42.6s-81.2 26-81.2 26 32.6 37.8 94.9 42.5 109.1-20.3 125.1-59c7.5-18.1 10.2-37.6 8.4-55.8z" fill="#8dd4f0"/><path d="m220.8 348c.7.8 1.3 1.3 1.8 1.7-1.1-1.1-2.1-2.1-3.2-3.1.6.6 1.1 1 1.4 1.4z" fill="#aed9f1"/><path d="m241.1 424.2h5l2.6-18.7c-2-20.5-9.8-39.3-22.9-52.5-1.1-1.1-2.1-2.2-3.1-3.2-.5-.4-1.1-.9-1.8-1.7-.4-.4-.8-.9-1.4-1.4-13.3-12.4-23.2-16.4-30.4-11l-.4 2.8c11.9-8.8 71.1 34.3 52.4 85.7z" fill="#6786c4"/><path d="m20.3 477.8s50.9 35.6 126 24.7c58.3-8.5 108.9-68.3 98-118.6 0 0 18.5 48.1-8.4 90.3-27 42.1-129.2 84.3-215.6 3.6z" fill="#6786c4"/><path d="m195.7 501.8s7.6-31.2-19.2-55.7c-23.5-21.5-7.2 35.6-7.2 35.6s1.2 10 1.2 12c0 2.1 5.7 7.1 5.7 7.1" fill="#6786c4"/><path d="m155.8 313.5c25.8-16.7 21.2 6 46.8-12.3 23.5-16.8-.9-13.8-4.9-13.8s-9.6 3.7-18.2 6.6c-8.6 3-13.2 3.5-16.3 4.5" fill="#8dd4f0"/><path d="m184.1 502.3c15.4-35.2-12.9-62.4-12.9-62.4-10.4-10.4-27.3-26.9-48.1 15.6-5.1 10.4-6.9 18.7-6.8 25.5.2 28.3 55.3 48 67.8 21.3z" fill="#8dd4f0"/><g fill="#6786c4"><path d="m163.4 549.4c-.1-.2-.1-.3-.2-.6-7.8-22.8-26.7-15.4-15.8 9.7 0 0 0 .1.1.1 9 18.1 8.5 36.1 8.5 36.1 8.3-16.6 23.9-4.7 23.9-4.7-4.8-16.8 7.6-13.9 7.6-13.9-12.7-6-20.9-16.5-24.1-26.7z"/><path d="m163.2 548.8c.1.2.1.4.2.6-2.8-9-1.7-17.9 3.9-23.4 8.1-8.1 13.5-16.1 16.8-23.7-12.5 26.8-65.8 7-67.8-21.3 2 28 16.7 29.2 19.5 38.1 3.8 11.8-10.7 14.1-10.7 14.1 10.8 7 17.8 16.2 22.4 25.4 0 0 0-.1-.1-.1-10.9-25.1 8-32.5 15.8-9.7z"/><path d="m141.8 510.9c35.7 12.7 62.2-27.2 34.9-64.4 0 0 16.1 17.8 14.5 40.2-1.7 22.4-4.7 20.5-4.7 20.5l-19.9 9.7-12.4 4.7h-5.2m30.9 68.4s-10.9-11.4-21.1-2.7c0 0-2.5-15.8-9.2-30.3-5.9-12.7-5.7-21.8 1.8-21.8s1.1-3.1 1.1-3.1h-10.7l-16.8 1.1s26.5 15.3 30.9 61.5c.1 0 7.1-13.6 24-4.7m-55.2-146.6c16.7-18.3 26.3-42.9 38.2-64.6-.2 0-.4-.1-.6-.1-2.4-.7-15.7-6.6-23.6-8.6-7.9-1.9-23.3-3.6-28.1-3.6s-49.7-2.5-49.7-2.5c18.5 17-2.6 45.4-2.6 45.4 49.6-13.4 40.4 23.8 40.4 23.8 14.5-.7 22 4.5 26 10.2z"/><path d="m187.8 339.1-5.1-3.3s-1.5 5-2.5 6-3.9 12-3.9 12l-9.8 9.9-20 32.6c-3.8 2.3-8.5 5.1-10.8 7.4-3.1 3.1-5.6 5.5-5.6 5.5l-5.5 34.2s23.7-6.9 42.4-42.5c1.2-2.2 2.3-4.4 3.2-6.6 0-.1 0-.1.1-.1 9.9-22.9 7.6-46.7 17.5-55.1z"/></g><path d="m58.4 409.5s42.4-35.1 94.1-31.7c0 0-39.6 9.5-53.7 55.4 0 0 2.3-30.7-40.4-23.7z" fill="#5273b8"/><path d="m223.2 350.1-.2-.2c-.2-.3-.5-.6-.8-.9-30.4-37.4 21.4-74.2 21.4-123.5 0-50.3-43.7-57.6-43.7-57.6l-34.9 12.6c41.4-9.2 73.3 8.5 73.3 45.3s-31.3 83-53.4 83l1.9 7.1c-3 3.2-3.3 7 5 10.9 1.3.6 2.5 1.2 3.7 1.8l2.5 2.1c-6.8-1.8-8.1-2.2-8.1-2.2l-.3 2.4c-.5.1-1 .2-1.5.4-4.9 1.7-5.4 2.1-6 2.7l3.4 7.4c2.3-3.3 6.6-5.5 13.9-2.9 6.9 2.4-.4-4.1-1.6-5.2 1.8.2 3.6.8 5.6 1.6l3.3 2.6 5.2 5.8 8.7 5.2 3.5 2.7c-.4-.4-.7-.9-1.1-1.3.4.4.8.8 1.2 1.3 0 .1-.4-.4-1-1.1z" fill="#6786c4"/><path d="m262 137.3c-.9-.3-1.7-.5-2.5-.7-1.2-.3-2.8-.7-4.7-1 2.4.5 4.8 1.1 7.2 1.7z" fill="none"/><path d="m254.8 135.6c-17.9-3.2-64.3-5.3-86.9 52.4 22.1-5.2 42 6.4 42 6.4-6.6-64.2 52.2-57.1 52.2-57.1-2.5-.6-4.9-1.2-7.3-1.7z" fill="#6786c4"/><path d="m259.5 136.6c.8.2 1.7.5 2.5.7 0 0-.9-.3-2.5-.7z" fill="#6786c4"/><path d="m150.6 195.9c5.7-4.1 11.6-6.5 17.3-7.9 22.6-57.7 69-55.6 86.9-52.4 1.9.3 3.5.7 4.7 1-87.1-23.9-108.9 59.3-108.9 59.3z" fill="#5273b8"/><path d="m169.9 252.2c15.2 19.4-13.8 41.2-25 36.7-11.2-4.4 10.4-55.3 25-36.7z" fill="#5273b8"/><path d="m164.9 268.1c-2.4.9-5-.9-6-4-.9-3.1.2-6.3 2.6-7.1 2.4-.9 5 .9 6 4 .9 3-.3 6.2-2.6 7.1z" fill="#fff"/></svg>

data:image/svg+xml;base64,<svg height="2500" viewBox="0 0 367.3 594.7" width="1544" xmlns="http://www.w3.org/2000/svg"><path d="m360.7 285.8c-41.1-28.6-115.3 51.3-132.2 43s-27.5 4.3-27.5 4.3l-1 13.3c6.5 2.7 13.6 3 21.2 1.8l-12.4 56.4s5.5 88.1 27.8 47.2c2.3-4.2 4.9-7.9 7.6-11.1-20.1-12.6-43.6-36.8-21-69.6 3.5-5.1 7.2-9.9 11-14.5.3-.4.6-.7.9-1.1.4-.4.7-.8 1.1-1.3l.1-.1c37.8-46.5 75.8-60 94.5-52.7 8.8 3.4 18.7-6.8 25.6 0 4.9 4.9-3.4 9.2-3.4 9.2 12.8.9 20.5-16 7.7-24.8z" fill="#8dd4f0"/><path d="m235.1 355.4c-.3.4-.6.7-.9 1.1.7-.8 1.3-1.6 1.9-2.4-.3.5-.6.8-1 1.3z" fill="#87b3e0"/><path d="m356.3 301.3c-6.8-6.8-16.7 3.4-25.6 0-12.9-5-35-.1-59.9 18.7-28 21.3-33.2 22.5-58.9 20.2-20.3-1.9 1 26 9.7 33.3-19.7 31.5 3.1 48.6 22.7 60.9 16.3-27.6 48.2-14.3 48.2-14.3-22.1-39 37.2-53.3 37.2-53.3-5-3.9-9-8.2-12-12.7-15.8-23.7-5.6-52.6 10.8-49.9.7.1 1.4.3 2.2.5 3.4 1.3 6.9 2.6 10.8.6 5.7-2.9 10.9-2.3 12.6-.1.9 1.1.9 2.6-.3 4.2-.2.2-.4.4-.5.6-.1.1-.2.3-.4.4-.1 0 8.2-4.2 3.4-9.1z" fill="#6786c4"/><path d="m3.4 352.9c31.8-43.5 135.2 11.8 149.5-2.6s29.4-5.3 29.4-5.3l5.7 13.2c-5.6 5-12.8 7.8-20.9 9.2l32.4 53s25.3 91.5-11.7 57.8c-3.8-3.5-7.7-6.3-11.6-8.6 16-19.8 31.5-52.7-3-78.1-5.4-4-10.8-7.6-16.3-10.9-.4-.3-.8-.6-1.3-.8l-1.5-.9s-.1 0-.1-.1c-54.7-34-98.1-34.4-114.5-20.5-7.8 6.6-21.4-.4-26 9-3.3 6.7 6.7 8.1 6.7 8.1-13 5.4-26.7-9.1-16.8-22.5z" fill="#8dd4f0"/><path d="m154 378.7s-.1 0-.1-.1c0 .1.1.1.1.1zm1.5.9c.5.3.8.6 1.3.8-.9-.6-1.9-1.2-2.8-1.8.5.4 1 .7 1.5 1z" fill="#87b3e0"/><path d="m67 371.8c21.9 1.2 43.5 6.4 65.3 9 15.7 1.8 31.4 3.2 47.2 4.6 5.8-14.2 10.6-36.6-5.6-29.2-25.3 11.4-31.1 11.9-67 .1-31.9-10.4-56.1-7.7-67.5 1.9-7.8 6.6-21.4-.4-26 9-3.3 6.7 6.7 8.1 6.7 8.1-.2-.1-.3-.2-.5-.3-.3-.1-.5-.3-.8-.5-1.8-1.3-2.3-2.8-1.8-4.2 1-2.8 6-5.2 12.8-4.3 4.6.6 7.7-1.9 10.7-4.4.7-.5 1.3-.9 2-1.3 8.6-4.6 18.4.9 24.5 11.5z" fill="#6786c4"/><path d="m329.7 366.8s-56.9-16.3-103.9 2.8c0 0 42.1 2.2 66.6 50.5 0 0-20.1-34.8 37.3-53.3z" fill="#5273b8"/><path d="m189.8 15.9c-37.2 14.1-54.8 92.7-37.6 149.5 2-2.4 8.9-5.1 11.1-8.1 15.1-21.1 47 11.9 47 11.9-16.5-16.6-28.3-65.5-20.5-101.2 11.9-54.6 63.7-35 63.7-35s-18.6-34.2-63.7-17.1zm-51.6 176.7c4.6 0 0 0 0-4.7 0-1 .5-2 1.3-3.1l-5.8 3.4c1.5 2.7 3 4.4 4.5 4.4z" fill="#6786c4"/><path d="m159.6 172.9c-.9-2.5-1.7-5-2.5-7.6-8.8 10.8-15.1 15.8-17.6 19.3z" fill="#6786c4"/><path d="m203.2 2.4c-46.2 0-73.9 71.6-73.9 71.6s-4.7 69.9-2.8 86.3c1.3 11.1 4.1 21.9 7.2 27.8l5.8-3.4c2.6-3.5 8.9-8.5 17.6-19.3-17.2-56.7-2.5-133.2 34.7-147.4 45.1-17.1 61.6 14.9 61.6 14.9s-13.7-30.5-50.2-30.5z" fill="#5273b8"/><path d="m246.4 437.3-47.8 39.9c10.4 10.4.5 11.9 3.9 20.4 10.8 27.3-9.3 32.8-15 33.8 2.6 0 11.5 2.4 21.9 8.7 18.3 11 22.9 29.3 22.9 29.3 4.7-15.3 20.7-8.6 20.7-8.6-6.6-10.6.8-13.6.8-13.6-36.1-9.2-36.2-21.7.1-58s-7.5-51.9-7.5-51.9z" fill="#6786c4"/><path d="m135.8 296.8c-11.3 1.9-27.6 8.4-15 30 1.2-4.8 2.7-9.5 4.3-13.4 1.4-3.6 5.8-10 10.7-16.6z" fill="#aed9f1"/><path d="m178.2 361.1c4.9-31.5 22.2-32.1 47.6-8.2-.1-.1-.2-.2-.2-.3-25-25-26.6-34.4-12.8-55l-29.5-3.5-19.8 1.9h-18.5s-4 0-9.1.8c-4.9 6.6-9.3 13-10.7 16.7-1.6 3.9-3.1 8.6-4.3 13.4.3.6.6 1.1 1 1.7 20.8 33 44.4-23.1 49.6 22.2 3.7 32.5-17.9 58.5-17.9 58.5s19.7-16.3 24.6-48.2z" fill="#6786c4"/><path d="m103.9 196.2s-35.3-57.3 25.1-88.1c0 0-46.7 32.5-14 80.1" fill="#8dd4f0"/><path d="m126.6 136.5c-6-16.5 2.3-28.4 2.3-28.4-48.3 34.9-15.5 77.9-15.5 77.9 7 10.2 12.9 13.9 18 13.8-5.4-21-8.5-41.7-4.8-63.3z" fill="#6786c4"/><path d="m138.2 181.2 19.4 4.3c24-67.1 104.5-48.2 104.5-48.2-91.2-33-123.9 43.9-123.9 43.9z" fill="#8dd4f0"/><path d="m203.2 6.6c36.8-2.2 50.3 26.3 50.3 26.3-20.9-48.2-91.3-44.3-122.5 17.5-31.2 61.9-4.1 120.8-28.2 144.8-25.6 25.6-46.9 40.5-39.8 85.8s53.4 68.9 76.7 45.6c20.1-20.1 39-24.6 48.8-19.8 8.7 4.6 15.9 1.3 21.9-6.2 14.6-19.4 34.1-52.5 29.6-87.5-6.2-48.3-69.2-50.6-101.9-31.9-26.6-124 32.4-172.6 65.1-174.6z" fill="#8dd4f0"/><path d="m228.4 271.8c-11.5 22.9-29.6 36.4-45.7 33.4v14.1c3.1 1.1 11.8 7.5 12.3 7.5s17.4 10.5 17.4 10.5-6.6-14.4-.2-29.6c5.1-12.1 12.5-28 16.2-35.9z" fill="#6786c4"/><path d="m202.5 331.7s.2.1.4.4c4.9 1.2-.4-.4-.4-.4z" fill="#87b3e0"/><path d="m246.1 424.2h-5c18.7-51.3-40.4-94.4-52.4-85.7l.4-2.8c-4.5 3.4-8.1 10.4-10.8 21.2-8.5 33.5-24.8 52.3-24.8 52.3-29.7 0-25 15.7-51.9 42.6s-81.2 26-81.2 26 32.6 37.8 94.9 42.5 109.1-20.3 125.1-59c7.5-18.1 10.2-37.6 8.4-55.8z" fill="#8dd4f0"/><path d="m220.8 348c.7.8 1.3 1.3 1.8 1.7-1.1-1.1-2.1-2.1-3.2-3.1.6.6 1.1 1 1.4 1.4z" fill="#aed9f1"/><path d="m241.1 424.2h5l2.6-18.7c-2-20.5-9.8-39.3-22.9-52.5-1.1-1.1-2.1-2.2-3.1-3.2-.5-.4-1.1-.9-1.8-1.7-.4-.4-.8-.9-1.4-1.4-13.3-12.4-23.2-16.4-30.4-11l-.4 2.8c11.9-8.8 71.1 34.3 52.4 85.7z" fill="#6786c4"/><path d="m20.3 477.8s50.9 35.6 126 24.7c58.3-8.5 108.9-68.3 98-118.6 0 0 18.5 48.1-8.4 90.3-27 42.1-129.2 84.3-215.6 3.6z" fill="#6786c4"/><path d="m195.7 501.8s7.6-31.2-19.2-55.7c-23.5-21.5-7.2 35.6-7.2 35.6s1.2 10 1.2 12c0 2.1 5.7 7.1 5.7 7.1" fill="#6786c4"/><path d="m155.8 313.5c25.8-16.7 21.2 6 46.8-12.3 23.5-16.8-.9-13.8-4.9-13.8s-9.6 3.7-18.2 6.6c-8.6 3-13.2 3.5-16.3 4.5" fill="#8dd4f0"/><path d="m184.1 502.3c15.4-35.2-12.9-62.4-12.9-62.4-10.4-10.4-27.3-26.9-48.1 15.6-5.1 10.4-6.9 18.7-6.8 25.5.2 28.3 55.3 48 67.8 21.3z" fill="#8dd4f0"/><g fill="#6786c4"><path d="m163.4 549.4c-.1-.2-.1-.3-.2-.6-7.8-22.8-26.7-15.4-15.8 9.7 0 0 0 .1.1.1 9 18.1 8.5 36.1 8.5 36.1 8.3-16.6 23.9-4.7 23.9-4.7-4.8-16.8 7.6-13.9 7.6-13.9-12.7-6-20.9-16.5-24.1-26.7z"/><path d="m163.2 548.8c.1.2.1.4.2.6-2.8-9-1.7-17.9 3.9-23.4 8.1-8.1 13.5-16.1 16.8-23.7-12.5 26.8-65.8 7-67.8-21.3 2 28 16.7 29.2 19.5 38.1 3.8 11.8-10.7 14.1-10.7 14.1 10.8 7 17.8 16.2 22.4 25.4 0 0 0-.1-.1-.1-10.9-25.1 8-32.5 15.8-9.7z"/><path d="m141.8 510.9c35.7 12.7 62.2-27.2 34.9-64.4 0 0 16.1 17.8 14.5 40.2-1.7 22.4-4.7 20.5-4.7 20.5l-19.9 9.7-12.4 4.7h-5.2m30.9 68.4s-10.9-11.4-21.1-2.7c0 0-2.5-15.8-9.2-30.3-5.9-12.7-5.7-21.8 1.8-21.8s1.1-3.1 1.1-3.1h-10.7l-16.8 1.1s26.5 15.3 30.9 61.5c.1 0 7.1-13.6 24-4.7m-55.2-146.6c16.7-18.3 26.3-42.9 38.2-64.6-.2 0-.4-.1-.6-.1-2.4-.7-15.7-6.6-23.6-8.6-7.9-1.9-23.3-3.6-28.1-3.6s-49.7-2.5-49.7-2.5c18.5 17-2.6 45.4-2.6 45.4 49.6-13.4 40.4 23.8 40.4 23.8 14.5-.7 22 4.5 26 10.2z"/><path d="m187.8 339.1-5.1-3.3s-1.5 5-2.5 6-3.9 12-3.9 12l-9.8 9.9-20 32.6c-3.8 2.3-8.5 5.1-10.8 7.4-3.1 3.1-5.6 5.5-5.6 5.5l-5.5 34.2s23.7-6.9 42.4-42.5c1.2-2.2 2.3-4.4 3.2-6.6 0-.1 0-.1.1-.1 9.9-22.9 7.6-46.7 17.5-55.1z"/></g><path d="m58.4 409.5s42.4-35.1 94.1-31.7c0 0-39.6 9.5-53.7 55.4 0 0 2.3-30.7-40.4-23.7z" fill="#5273b8"/><path d="m223.2 350.1-.2-.2c-.2-.3-.5-.6-.8-.9-30.4-37.4 21.4-74.2 21.4-123.5 0-50.3-43.7-57.6-43.7-57.6l-34.9 12.6c41.4-9.2 73.3 8.5 73.3 45.3s-31.3 83-53.4 83l1.9 7.1c-3 3.2-3.3 7 5 10.9 1.3.6 2.5 1.2 3.7 1.8l2.5 2.1c-6.8-1.8-8.1-2.2-8.1-2.2l-.3 2.4c-.5.1-1 .2-1.5.4-4.9 1.7-5.4 2.1-6 2.7l3.4 7.4c2.3-3.3 6.6-5.5 13.9-2.9 6.9 2.4-.4-4.1-1.6-5.2 1.8.2 3.6.8 5.6 1.6l3.3 2.6 5.2 5.8 8.7 5.2 3.5 2.7c-.4-.4-.7-.9-1.1-1.3.4.4.8.8 1.2 1.3 0 .1-.4-.4-1-1.1z" fill="#6786c4"/><path d="m262 137.3c-.9-.3-1.7-.5-2.5-.7-1.2-.3-2.8-.7-4.7-1 2.4.5 4.8 1.1 7.2 1.7z" fill="none"/><path d="m254.8 135.6c-17.9-3.2-64.3-5.3-86.9 52.4 22.1-5.2 42 6.4 42 6.4-6.6-64.2 52.2-57.1 52.2-57.1-2.5-.6-4.9-1.2-7.3-1.7z" fill="#6786c4"/><path d="m259.5 136.6c.8.2 1.7.5 2.5.7 0 0-.9-.3-2.5-.7z" fill="#6786c4"/><path d="m150.6 195.9c5.7-4.1 11.6-6.5 17.3-7.9 22.6-57.7 69-55.6 86.9-52.4 1.9.3 3.5.7 4.7 1-87.1-23.9-108.9 59.3-108.9 59.3z" fill="#5273b8"/><path d="m169.9 252.2c15.2 19.4-13.8 41.2-25 36.7-11.2-4.4 10.4-55.3 25-36.7z" fill="#5273b8"/><path d="m164.9 268.1c-2.4.9-5-.9-6-4-.9-3.1.2-6.3 2.6-7.1 2.4-.9 5 .9 6 4 .9 3-.3 6.2-2.6 7.1z" fill="#fff"/></svg>

Tải xuống Biểu tượng Vectơ C�y Th?y Sinh H?c Vi?n Khan (SVG)

Bằng cách tải xuống cho bạn các biểu tượng Vector Logo, bạn đã đồng ý với các điều khoản sử dụng của chúng tôi.

Logo :

Đăng ký kế hoạch tải xuống đồ họa

Đăng ký kế hoạch tải xuống đồ họa