Размер видео: 1280 X 720853 X 480640 X 360
Показать панель управления
Автовоспроизведение
Автоповтор
thank you for this explanation teacher
do you spin down tubes 1 and 3 when doing the chemical/cell counts?
thank you for this explanation teacher
do you spin down tubes 1 and 3 when doing the chemical/cell counts?