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Trap outlet pipe should not be immersed in water.
疏水阀的出水管不应浸在水里。
youdao
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Trap outlet pipe should not be Hydraulic control valves immersed in water.
疏水阀的出水管不应浸在水里。
youdao
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Trap outlet pipe should not be Hydraulic control valves immersed in water.
疏水阀的出水管不应浸在水里。
youdao