periodical inspection造句怎么写

For a long time, the maintenance mode of relay protection equipments is based on the principle of mainly periodical inspection, supplemented by break maintenance.

Research and development of the periodical inspection and prewarning management system for mine electromechanical devices

Testing regulations for light bus and light van periodical inspection

Maojianshan hydropower station has operated for 40 years safely. Two times of periodical inspection has been carried out, and the dam has assessed as normal one.