求翻译：焊接时，应尽量采用小电流、短弧、窄焊缝、短焊道（每段不大于50mm）并在焊后及时轻轻锤击焊缝以松弛应力，防止焊后开裂。是什么意思？

Welding, you should try using a small current, short arc, narrow weld, short weld (each not more than 50mm) and gently hammering the weld after welding in a timely manner to relaxation of stress after welding to prevent cracking.

As far as possible, at the welding should be a low-current, short, narrow arc welding, weld, and short (each is no more than 50 MM) and the time after welding to gently hammer weld stress relaxation after welding to prevent cracking.

When welding, should use the undercurrent, the short arc, the narrow welded joint, the short weld bead as far as possible (each section is not bigger than 50mm) and prompt hammers the welded joint after welding to relax the stress gently, after prevented welds cracks.

When welding, you should try to use smaller currents, short, short-arc, narrow weld weld (each period is not more than 50mm) and lightly hammering in a timely manner after welding the weld stress to relaxation, prevention of weld cracking.

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