题目内容
According to the type of laser working substance. Lasers can be divided into ( ).
查看答案
搜索结果不匹配？点我反馈
更多问题
Using laser technology to print the required marks or labels on the surface of the material belongs to ( ).
The material used to make the model with the laser is ( ).
The method of improving the surface performance by designing and improving the laser treatment on the surface of the workpiece is ( ).
A laser weapon is a directed energy weapon that uses a directionally launched ( ) to directly damage or invalidate the target.
微信支付 
支付宝支付