GB/T 17213.3-2005
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
Industrial-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