亚洲伊人一本大道中文字幕-国产性生大片免费观看性-天堂√最新版中文在线地址-97久久久综合亚洲久久88-精品一区二区三区四区五区六区

In May, in order to make the new employees master welders should possess the professional theoretical knowledge and operating skills. The company organized a new employee occupation skill training school in Shantou special equipment welder skill training course.

This course is a professional course of integration of professional technology theory and skills. Main contents include: common welding method, the common metal materials and welding, fitter basic operation of process knowledge, and the skill training.