作业帮英语：下面有错误吗we found some tack welds of main girder stiffener w
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英语：下面有错误吗
we found some tack welds of main girder stiffener was unqualified,in the tack weld have the existence of cracks、 holes and other defects.The quality of tack weld should be like formal weld.Tack weld thickness should not less than 3 mm,length should be not less than 40 mm,spacing should be 300 mm to 600 mm.
we found some tack welds of main girder stiffener was unqualified,in the tack weld have the existence of cracks、 holes and other defects.The quality of tack weld should be like formal weld.Tack weld thickness should not less than 3 mm,length should be not less than 40 mm,spacing should be 300 mm to 600 mm.
we found some tack welds of main girder stiffener unqualified.
There are cracks,holes and other defects in the tack weld.
The quality of tack weld should be like formal weld.And the thickness should be not less than 3 mm,length not less than 40 mm,spacing to be 300 mm to 600 mm.
There are cracks,holes and other defects in the tack weld.
The quality of tack weld should be like formal weld.And the thickness should be not less than 3 mm,length not less than 40 mm,spacing to be 300 mm to 600 mm.
tack welds 是什么意思?
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