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。
And emphasizes the applications of laser welding, electronic beam 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。
The welding of hollow aluminium ball has more particularities, it adopts the vacuum electronic beam welding that is more favorable than laser welding.
空心铝球的焊接更有特殊性，采用真空电子束焊接比激光焊接更为有利。
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