阀门标准 BS EN 1704-1997 塑料管道系统.热塑塑料阀.弯曲情况下温度循环后阀门完整性的试验方法Plastics piping systems – Thermoplastics valves – Test method for the integrity of a valve after temperature cycling under bending.pdf [db:摘要]
阀门标准 BS EN 558-2-1996 Industrial valves — Face-to-face and centre-to-face dimensions of metal.pdf [db:摘要]
