彩虹科普
Region: TW
Friday 10 July 2026 17:08:11 GMT
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火凤凰 :
简单地说就是保护剂！常用的有烧結 陶质(灰)431焊丝H08Mn焊Q235，H10Mn焊Q345
2026-07-11 01:53:26
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user7377239817106 :
😳😳😳
2026-07-12 10:03:02
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