采用热膨胀力测试系统和孔隙测定装置研究了不同温度条件下砂岩和石灰岩的热膨胀力和孔隙率的变化规律。
The change laws of heat swelling power and porosity of sandstone and limestone were researched at different temperatures using a heat swelling power experimental system and a porosity test apparatus.
保温层摩擦力在管道受热膨胀时，能很好的抵消热膨胀力，可以有效地限制管道沿轴向伸长，提高了供热直埋管道的安全性。
Insulation friction in the pipe thermal expansion, well counteract thermal expansion forces can effectively restrict the pipeline along the axial elongation, improved safety Buried heating pipe.
模具升温时受热膨胀，降温时又会收缩，使锁模力很不稳定。
Due to the molds expansion when in temperature rising and its shrinkage when in temperature drop, the clamping force is quite unstable.
模具升温时受热膨胀，降温时又会收缩，使锁模力很不稳定。
Due to the mold's expansion when in temperature rising its shrinkage when in temperature drop, the clamping force is quite unstable.
模具升温时受热膨胀，降温时又会收缩，使锁模力很不稳定。
Due to the mold's expansion when in temperature rising and its shrinkage when in temperature drop, the clamping force is quite unstable.
模具升温时受热膨胀，降温时又会收缩，使锁模力很不稳定。
Due to the mold's expansion when in temperature rising and its shrinkage when in temperature drop, the clamping force is quite unstable.
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