The pressure limit valve is still used to cover the steam nozzle for ensuring the surplus steam to exhaust freely.

汽嘴之上仍用压阀扣上，以保证多余的蒸汽能自由排放。

youdao

The pressure limit valve is still used to cover the steam nozzle for ensuring the surplus steam to exhaust freely.

汽嘴之上仍用压阀扣上，以保证多余的蒸汽能自由排放。

youdao