API STD 609
发布时间：2024-03-22 11:40:00 点击量：1136
Butterfly Valves: Double-flanged, Lugand Wafer-type, and Butt-welding Ends
蝶阀：双法兰式、凸耳式、对夹式和对焊端
Butterfly Valves: Double-flanged, Lugand Wafer-type, and Butt-welding Ends
蝶阀：双法兰式、凸耳式、对夹式和对焊端