A.細(xì)粒狀 B.等軸狀 C.柱狀 D.團絮狀
A.1-3mm B.3-8mm C.8-15mm D.15-30mm
A.熔化焊、壓力焊、釬焊 B.電焊、氣焊、釬焊 C.熔化焊、電焊、釬焊 D.壓力焊、電焊、氣焊