In vocational and technical colleges,theprofessional of weldingwidely used all kinds of methods operationas a maintask for students topracG tice.In order to let thestudents tostudyof weldingtechnology widely,in addition to master thewelding operationtechnology,also wantto have some grasp of theproductionof welding material.Asthe topic for thewelding materialwhich used widely inJ422acid electrodeasa new experimentcontent,helping the students toexpand the employment scope after graduationemployment.
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