Harden tendency of steel, content and distribution of hydrogen in welded joints, restraint stress resistance of joints are three factors that leads to the cold cracks of the welded joints.

钢材的淬硬倾向、焊接接头含氢量及其分布，以及接头所承受的拘束应力状态是产生焊接冷裂纹的三大主要因素。

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The intensity of the stress effect on colonic motility was evaluated in eshour cold-restraint stressed rats. The contractile motility was recorded before, during and 1h and 60 hrs after stress.

对大鼠结肠收缩活动及排粪质量的观察发现，持续6小时的寒冷束缚应激引起其结肠动力显著增强，应激解除后60小时仍未恢复。

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