结果表明：夹杂物局部偏聚是铜管断裂的内在原因。焊接时产生的热应力及弯曲变形是铜管断裂的外部诱发因素。
The results show that the aggregation of contaminant is the inner cause of Copper pipe crack, while the thermal stress formed during welding and winding deformation is another two important factors.
考虑到印度板块的推挤、重力和热应力场的共同作用，可以较好地解释青藏高原构造变形的特点及动力学机制。
Considering stress field caused by combined effect of northward push from Indian plate, gravity and thermal stress, tectonic deformation features in Qinghai Tibet plateau can be understood better.
流槽损伤的主要形式是由弯曲力及热应力引起的变形和强烈的热作用引起的熔蚀。
The principal forms of the damages in the pouring spout are the deform caused by the bending forces and thermal stress as well as the fusion aroused by the intensive thermal effect.
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