CB/T 3945-2002 Cast steel flanged stop valves with bellows. 1范围 CB/T 3945规定了法兰连接尺寸和密封面按GB/T 569、GB/T...
CB船舶标准
CB船舶标准
CB船舶标准
CB/T 3945-2013 法兰铸钢带波纹管截止阀
CB/T 3945-2013 Cast steel flanged stop valves with bellows. 1范围 CB/T 3945规定了法兰连接尺寸按GB/T 569、GB/T 250...