The main valve by valve, O-rings, lock, stem, frame, (hand wheel) pneumatic devices composed pieces.

本阀主要由阀体、O型圈、闸板、阀杆、支架、（手轮）气动装置等件组成。

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The main valve by valve, O-rings, lock, stem, frame, (hand wheel) pneumatic devices composed pieces.

本阀主要由阀体、O型圈、闸板、阀杆、支架、（手轮）气动装置等件组成。

youdao