BS EN 1092-1-2007 法兰及其连接件按PN标注的管、阀门、配件和

liuxilin1215 发表于 2015-5-16 07:56:48

BS EN 1092-1-2007 Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges
法兰及其连接件按PN标注的管、阀门、配件和附件用圆形法兰第1部分：钢法兰

admin 发表于 2015-5-19 10:40:24