Hardness, tensile strength, breaking elongation ratio and aging property of samples were tested and surface of sample after aging was represented by SEM.
对试样进行了硬度、拉伸强度、断裂伸长率、热老化等性能试验；对老化后的试样表面进行了SEM表征。
Stereo light microscope which possesses relatively large depth of field, good performance in real-time and no breaking surface of sample, is used in stereo three-dimensional information measurement.
体视显微镜具有工作空间大、实时性高以及不损坏样品表面等优点，己用于微观对象三维立体信息的测量。
A new micro constant force displacement sensor with micro and constant measurement force is introduced. It can realize the measurement of bullet marks without damage on the surface of sample bullets.
该系统采用了一种新型的微恒力位移传感器，该传感器具有测量力小且恒定的特点，因此，可以实现对弹头表面痕迹的无损测量。
A new micro constant force displacement sensor with micro and constant measurement force is introduced. It can realize the measurement of bullet marks without damage on the surface of sample bullets.
该系统采用了一种新型的微恒力位移传感器，该传感器具有测量力小且恒定的特点，因此，可以实现对弹头表面痕迹的无损测量。
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