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 EN 12266-2-2002 Industrial valves. Testing of valves. Tests, test procedures and acceptance criteria. Supplementary requirements.pdf [db:摘要]
