【精品EHS安全文档】热作业专项培训
安全环保部HOTWORK热作业专项培训WELDINGisaprocessthatjoinsmaterials,usuallymetalsorthermoplastics,bycausingcoalescence.Thisisoftendonebymeltingtheworkpiecesandafillermaterialtoformapoolofmoltenmaterialthatcoolstobecomeastrongjoint,butsometimespressureisusedinconjunctionorbyitself,toproducetheweld.焊接是通过普通金属的热聚合来连...
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