chemist with mask and respirator is working in laboratory, conduct experiment with test tube
0:27
chemist with mask and respirator is working in laboratory, conduct ex…
2020年4月13日
AdobeIaroslav
Scientist in protection suit and masks working in research lab using laboratory equipment: microscopes, test tubes. Medicine, healthcare and technology concept.
0:16
Scientist in protection suit and masks working in research lab usi…
2024年4月23日
AdobeAcronym
Scientists in protection suits and masks working in research lab using laboratory equipment: microscopes, test tubes. Coronavirus covid-19 hazard, pharmaceutical discovery, bacteriology and virology.
0:26
Scientists in protection suits and masks working in research lab usi…
2020年3月28日
AdobeAcronym
Scientist in protection suit and masks working in research lab using laboratory equipment: microscopes, test tubes. Medicine, healthcare and technology concept.
0:09
Scientist in protection suit and masks working in research lab usi…
2024年4月29日
AdobeAcronym
Comprehensive Mask Testing
Comprehensive Mask Testing
2022年1月7日
armbrustusa.com
Scientist in green protective mask and gloves holding test tube with plant sample, researching botany and medical applications using a microscope. Medicine, healthcare and science concept.
Scientist in green protective mask and gloves holding test tube with …
1 个月前
alamy.com
Scientist in green protective mask and gloves holding test tube with plant sample, researching botany and medical applications using a microscope. Medicine, healthcare and science concept.
Scientist in green protective mask and gloves holding test tube with …
1 个月前
alamy.com
Scientist in green protective mask and gloves holding test tube with …
1 个月前
alamy.com
2:04
How scientists test face mask effectiveness against coronavirus
2020年6月21日
NBC News
0:29
How does wearing a mask help keep you and others safe? | Harvard Un…
已浏览 8万 次2020年10月22日
FacebookHarvard University
2:59
Face mask effectiveness: What we know now
2023年10月29日
CBS News
6:14
11K views · 114 reactions | Researchers at Harvard and MIT h…
已浏览 1.1万 次5 天之前
FacebookNDTV
6:54
Why wearing a mask matters: coronavirus transmission explained
2020年4月25日
MSNBC.com
Does your homemade mask work? Here’s how you can test it
2020年7月31日
weforum.org
5:55
Laboratory Safety Techniques: Protecting People and Equipment
已浏览 12.4万 次2014年3月13日
Study.comElizabeth Friedl
1:34
102K views · 62 reactions | Scientists from Harvard and MIT c…
已浏览 10.2万 次2 周前
FacebookPlayGround
1.1: Safety Procedures for the Microbiology Laboratory
2021年4月29日
libretexts.org
1:02
This simple test analyzes effectiveness of masks
2020年8月11日
ABC News
2:56
37K views · 488 reactions | Wearing a face mask is one important inter…
已浏览 3.8万 次1 周前
FacebookMayo Clinic
2:12
Lab tests reveal the best and worst face masks
2021年2月18日
cbc.ca
Find out if your mask meets national standard for barrier face coverings
2021年10月8日
tmj4.com
0:18
$
Scientists Protection Suits Masks Working Research Stock Footage …
2019年9月13日
shutterstockMaksim Shmeljov
ASTM F2101 | IS 16288 Demonstration Video Bacterial Filt…
已浏览 1488 次2020年5月30日
YouTubeAhujaTech
1:14
How to Use Mask Testing on the 2 Series MSO Oscilloscope
已浏览 627 次2022年6月18日
YouTubeTektronix
14:58
Masks, no evidence they work
已浏览 104.2万 次2023年3月2日
YouTubeDr. John Campbell
7:00
Should everyone be wearing a mask to protect against coronavirus?
已浏览 7.7万 次2020年4月1日
YouTubePBS NewsHour
Best Masks to Keep COVID-19 to Yourself
已浏览 20.2万 次2020年6月30日
YouTubeLiveScience
0:23
Scientist in protection suits and masks working in research lab usi…
2020年5月11日
AdobeAcronym
TXST’s Dr. Rodney Rohde, chair & professor of clinical laboratory sci…
已浏览 1.4万 次2020年7月17日
FacebookTexas State University
5:10
Getting Started with the RTB2000 - Mask Testing
已浏览 841 次2022年4月28日
YouTubeRohde & Schwarz
观看更多视频
静态缩略图占位符