知識(shí)貝殼
知識(shí)貝殼
所屬欄目：海洋工程柔性立管與海底管道
Weldingisafabricationprocessthatjoinsmaterials,usuallymetalsorthermoplastics.Themainideaistobondthesurfacestogetherbyliquefyingthematerialsurfacesandthereafterallowingtheliquidtosolidify.Attheendofthisprocessthetwopiecesofmaterialhavebecomeonecontinuousso ......（本文共 1406 字 ） [閱讀本文] >>