Cracks may be prevented from developing at the corners of welded plating inserts by（）.<br>A:squaring the corners<br>B:rounding the corners<br>C:plug welding the corners<br>D:slot welding the corners

Cracks may be prevented from developing at the corners of welded plating inserts by（）.
A:squaring the corners
B:rounding the corners
C:plug welding the corners
D:slot welding the corners

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