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。
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。
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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