angle type of valves Face to face,end to end, center to face and center to end dimensions
阀门行业专业术语解析和分类表述 ... 直通式阀门结构长度 through way type of valves Face to face dimensions 角式阀门结构长度 angle type of valves Face to face,end to end, center to face and centerto end dimensions 结构形式 type of construction ...
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