2019-11-04 14:08:49
sawchina
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AS 1858.1-2003 Electrodes and fluxes for submerged-arc welding
AS 1858.1-2003 埋弧焊焊条、焊剂 下载地址：
链接：https://pan.baidu.com/s/1N40489fjhMaz6afjbDdNOA |
