单项选择题
A.+2.0,-3.0B.+5.0,-2.0C.+3.0,-2.0D.+3.0,-3.0
A.+5.0,-3.0B.+5.0,-2.0C.+3.0,-2.0D.+3.0,-3.0
A.凡凹坑深度大于板厚20%或大于2.0mm应补焊B.凡凹坑深度大于板厚10%或大于2.0mm应补焊C.凡凹坑深度大于板厚10%或大于1.0mm应补焊D.凡凹坑深度大于板厚20%或大于1.0mm应补焊