Grinding to eliminate shallow surface defects should be done（）.<br>A:parallel to the longitudinal direction of the chain<br>B:perpendicular to the direction of the anchor chain<br>C:diagonally across the link of the anchor chain<br>D:around the circumference of the chain link

Grinding to eliminate shallow surface defects should be done（）.
A:parallel to the longitudinal direction of the chain
B:perpendicular to the direction of the anchor chain
C:diagonally across the link of the anchor chain
D:around the circumference of the chain link

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