标 准 号：BS EN 1759-4-2003 简体中文标题：法兰及其连接件.标注等级的管道、阀门、配件及附件用圆形法兰.铝合金法兰 繁体中文标题：法兰及其连接件.标注等级的管道、阀门、配件及附件用圆形法兰.铝合金法兰 English Name：Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, class designated - Aluminium alloy flanges...