CB/T 3946-2002 Cast steel flanged stop check valves with bellows. 1范围 CB/T 3946规定了法兰连接尺寸和密封面按GB/T 56...
CB船舶标准
CB船舶标准
CB船舶标准
CB/T 3946-2013 法兰铸钢带波纹管截止止回阀
CB/T 3946-2013 Cast steel fangde check stop valves with bellows. 1范围 CB/T 3946规定了法兰连接尺寸按GB/T 569. GB...