double-seat safety valve的意思|示意
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英 / /
双座安全阀
double-seat safety valve的网络常见释义
双座安全阀 双作用蒸汽往复泵 duplex acting steam-driven reciprocating pump 双座安全阀 double-seat safety valve 双座阀, 双支承提升阀, 平衡阀 double-seat (drop) valve ..