BS EN 1333-2006 法兰及其接缝.管道部件.PN的定义和选择Flanges and their joints. Pipework components. Definition and se
标准简介
BS EN 1333-2006 法兰及其接缝.管道部件.PN的定义和选择Flanges and their joints. Pipework components. Definition and selection of PN
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