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。

youdao

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。

youdao