阀门标准 MSS SP-85-2002 法兰端和螺纹端灰铸铁截止阀和角阀 GRAY IRON GLOBE &ANGLE VALVES FLANGED AND THREADED ENDS.pdf [db:摘要]
阀门标准 BS 1212-3-1990 Float operated valves. part 3 Specification for diaphragm type float operated valves (plastics bodied) for coldwater services only.pdf [db:摘要]
