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密室采用钢板焊接，机械强度高，密封性发好。
The back room is welded with steel plates, with high mechanical strength and sound tightness.
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阀座环通过密封焊接，消除泄漏通道。
Remove the pressed in relief valve seat and seat O-ring.
youdao
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阀座环通过密封焊接，消除泄漏通道。
Remove the pressed in relief valve seat and seat O-ring.
youdao