🗻🍂⬅彩51下载手机版🔂🌃🌯🔯jīn nián hán jià lǐ pū tiān gài dì de hè suì dàng diàn yī yǐng yù gào xiàng wǒ men xí lái ， ér zuì ràng ...

"It's a disposable pipette system. The clear tubes are glass or plastic with markings for the volume inside. The orange/red ball is a hollow, collapsible ball with a hole over the pipette tip. The ...