Fatigue property of lean concrete should be studied when the material is set as base course since it withstands the repeated actions of load stress and temperature stress.
贫混凝土用于路面基层时，由于受到荷载应力和温度应力的反复作用，需研究其疲劳特性。
The Hall element can sense the change of the magnetic field caused by moving the set of magnetic sensing elements so as to judge the moving state of the lens load bearing base.
霍尔传感器可感测该组感磁元件移动时所造成的磁场变化，以判断镜头承载座的移动状态。
The Hall element can sense the change of the magnetic field caused by moving the set of magnetic sensing elements so as to judge the moving state of the lens load bearing base.
霍尔传感器可感测该组感磁元件移动时所造成的磁场变化，以判断镜头承载座的移动状态。
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