single-line subsurface safety valve的意思|示意
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单线井下安全阀
single-line subsurface safety valve的网络常见释义
单线控制井下安全阀 ... 单舌法撕破强力试验方法||tearing strength by tongue method 单线控制井下安全阀||single-line subsurface safety valve 单相渗流||single-phase fluid flow ...