Together with practice, the paper shows how to control thermal crack in large volume concrete by the cause of formation of crack.

本文从分析大体积混凝土裂缝形成的原因入手，结合大型水池底板混凝土施工的工程实例，阐述大体积混凝土温度裂缝的控制。

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Bearing parts in the process of hardening cooling by internal stress due to the formation of quenching cracks crack said.

轴承零件在淬火冷却过程中因内应力所形成的裂纹称淬火裂纹。

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The study on crack types and their formation mechanisms of silver based contact materials are carried out according to the various currents and various contact closed forces.

根据不同电流等级及不同触头闭合压力，对银基触头材料裂纹类型及形成机理进行了分析研究。

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Rather, as a consequence of injecting water and sand into the shale formation to crack the rocks so gas and oil will flow, massive amounts of waste water comes back to the surface with significant amounts of contaminants as a result of leaching out salt, heavy metals and trace amounts of radioactive materials from the rock formation itself.

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