骨头上切割痕迹的详细分析显示，它们与食肉动物留下的牙齿痕迹与爪痕存在本质的区别。
Detailed analysis of the cut marks on the bones show they differ substantially from tooth and claw marks that can be left by predators.
实验室工作人员和我们的内部金相实验室的设备也扩大到包括切割，抛光，腐蚀和金相分析。
Laboratory staff and our in-house metallographic laboratory equipment are also expanded to include cutting, polishing, corrosion and metallographic analysis.
介绍了一种实用型高功率、高光束质量CO2激光焊接、切割机，分析其光学系统。
A practical high-power CO2 laser welding and cutting equipment with high beam quality was introduced, the optical system was analyzed.
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