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Technology
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dual valve
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English
Chinese
dual close-in pressure valve
二次关井工具
dual disc check valve
双盘防逆阀
dual guided slush service valve
双导板泵阀
dual relief valve
调压阀
dual relief valve
双联安全阀
dual relief valve
保险阀
dual relief valve
减压阀
dual rotor valve
双旋子阀门
dual valve
双
联
阀
dual-valve
jetting tip
双气阀喷嘴
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