double shut-in method 两次关井测试法
double shut-in assembly 双管关井总成
double shut-off hose coupling 双向断流软管接头
There won't be any more of those for the foreseeable future, I think as I shut the double doors behind me, carefully.
我想,再也不会有谁可以预测到将来了,我小心翼翼地把身后的双层门关上。
Double-click IC_end.bat and close your browser window when you want to shut down the information center.
当希望关闭信息中心时,双击 IC_end.bat 并关闭浏览器窗口。
Product notes: We are developing a double block and bleed design seating arrangement for applications which require verifiable positive shut off.
产品说明:我们正在开发双重阻塞和排放结构的阀座排列设计,用于要求能够证明确实关断的应用环境。
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