cu laboratory tray with biohazard tray being pulled out/ hand placing tray with small containers filled with colored liquid on tray/ tray being pushed in/ slovenia - 生物危害標誌 個影片檔及 b 捲影像00:13
close up zoom out test tubes w/biological microorganism hazard logo and colored chemicals - 生物危害標誌 個影片檔及 b 捲影像00:21