hand -operated quick-closing stop valve的意思|示意
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手动快速关闭截止阀
hand -operated quick-closing stop valve的网络常见释义
手动速闭阀 The Hand wheel-Operated Packed Valve 手轮型衬垫阀 hand -operated quick-closing stop valve 手动速闭阀 hand-operated multi-vane regulating valve 手动多叶调节阀 ..