Because of the complexity of welding process, the research of weld process produce hot and stress through method of experiment is very difficulty.
因为焊接过程的复杂性，所以很难通过实验的方法对焊接过程产热和应力分布进行研究。
Through the welding experiment, the robot is tested when it works.
通过实际的焊接实验，验证机器人的实际焊接效果。
Through experiment from reason and practice, the influence of the preheating method on eliminating crack of pinch roller in the surfacing welding was discussed .
本文经过实验，从实践和理论上，研究了预热方法对消除夹送辊堆焊冷裂纹和热裂纹的影响。
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