影响气吸式排种器排种性能的因素很多，而决定吸力的吸室真空度是很重要的因素。
There are many factors affecting the characteristics of the suction-type metering device for precision drill. The important one is the vacuum degree or suction power of the vacuum chamber.
医生：在某些禁止吸烟的场所，如图书馆、剧院和办公室，你会觉得不吸。
Doctor: Do you find it difficult to refrain from smoking in places where it is forbidden such as the library, theater and office?
机器的中型灌装机是在实验室中经常使用的自动吸移管管理器。
Ab Series Machines are medium duty fillers that are often used in laboratories as automatic pipettors.
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