GB/T 17213.3-2005
ActiveIndustrial-process control valves Part 3-1:Dimensions-Face-to-face dimensions for flanged,two-way,globe-type,straight pattern and center-to-face dimensions for flanged,two-way,globe-type,angle pattern control valves
工业过程控制阀 第3-1部分:尺寸 两通球形直通 控制阀法兰端面距和两通球形角形 控制阀法兰中心至法兰端面的间距
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