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back valve | |||
counterbalance valve | |||
back-pressure valve; counter balance valve | |||
back pressure valve | |||
foot valve | |||
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back pressure valve | |||
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back-pressure valve |
背 压阀 : 12 phrases in 4 subjects |
Automobiles | 2 |
Oil / petroleum | 2 |
Refrigeration | 2 |
Technology | 6 |