A.立即進(jìn)行補(bǔ)焊 B.減壓后進(jìn)行補(bǔ)焊 C.抽真空后進(jìn)行補(bǔ)焊
A.2/10 B.2/100 C.2/1000
A.0mm~5mm B.5mm~10mm C.10mm~20mm