Monitoring contents are verticality and horizontality of support beam, which are monitored by laser plumb instrument and electronic theodolite separately.
监测内容为垂直度和支撑梁水平度，分别采用激光铅直仪和电子经纬仪。
2
And emphasizes the applications of laser welding, electronicbeam welding and plasma welding in the automobile industry.
并着重分析了激光焊接、电子柬焊接、等离子焊接在汽车工业各个方面的应用。
3
The welding of hollow aluminium ball has more particularities, it adopts the vacuum electronicbeam welding that is more favorable than laser welding.