Knowledge of basic electrical, welding, cutting and fitting of pipes, principles of hydraulic and air operated equipment.
基础电气知识，电焊，切割，装配管道，熟悉液压和气动设备的基本原理。
Mechanical and electrical basic knowledge, good hands-on skill.
机电基本知识，良好的动手能力。
Mechanical and electrical basic knowledge, good hands-on skill.
机电基本知识，良好的动手能力。
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