安全环保部安全环保部 WELDINGWELDING is a process that joins materials,usually metals orthermoplastics,bycausingcoalescence.Thisisoftendonebymeltingtheworkpiecesandafillermaterialtoformapoolofmoltenmaterialthatcoolstobecomeastrongjoint,butsometimespressureisusedinconjunctionorbyitself,toproducetheweld.焊接是通过普通金属的热聚合来连接材料的过程。一般通过溶解工件和填充材料来形成一个溶解材料填充池，通过冷却是它变成坚固的连接点，但是有时候也通过压力来造成连接，或者它自身来形成焊缝。DEFINITION 定义定义COMMON TYPES OF WELDING COMMON TYPES OF WELDING 普通的普通的 焊接焊接Oxy-Fuel Oxy-Fuel weldingwelding 氧气燃氧气燃氧气燃氧气
