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旋紧式泄水阀,开启方便。
Screw type drain valve, convenient opening.
youdao
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泄水阀应该是一种闸阀,并且有一致的闸板。
Sluice valves are to be of a non-rising stem type and to have solid wedge discs.
youdao
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泄水阀应该是一种闸阀,并且有一致的闸板。
Sluice valves are to be of a non-rising stem type and to have solid wedge discs.
youdao