... 公称压力 nominal pressure 允许工作压差 design differential pressure 双关双断阀门 double block-and-bleed ...
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double-block and bleed assembly 双止回装置和放气设施
DBB double block and bleed 双截断排放
double block-and-bleed valve 双截断与排放阀门
Double Block and Bleed Valves 双阻塞排放阀
double-block-and-bleed valve 双关双泄放阀
double block and bleed system 两端阻断放散系统
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