Port area shall be 100% of the mating pipe port area through the entire valve length.
整个阀门的流道截面应该与管道的流道截面100%相同。
The executive mechanism of Cu-Al pipe butt welder, based on above, was designed, including its air system and mating clamper.
在此基础上，设计了铜铝管对焊机的执行机构，包括其气动系统和配套夹具。
The executive mechanism of Cu-Al pipe butt welder, based on above, was designed, including its air system and mating clamper.
在分析了铜铝管焊接工艺过程的基础上，重点论述了铜铝管对焊机执行系统和控制系统的设计。
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