... bulb and valve combination 释义：打气球-放气阀联合装置 deflating valve 释义：放气阀 air escape 释义：放气,漏气 ...
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deflating g valve 放气阀
If the steam needs quick deflating, the deflation valve stem can be pressed to deflate the steam thoroughly.
如急于放气可压住放气阀杆把蒸汽放净。
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