What is a three-level maintenance system

The three-level maintenance system refers to:

Chinese name: Three-level maintenance system

English name: three-level service system

Explanation: It is a kind of equipment maintenance system combined with professional management maintenance and group management. The specific contents of the three-level maintenance include routine maintenance (commonly referred to as “insurance”), first-level maintenance (referred to as a guarantee) and second-level maintenance (referred to as “secondary insurance”).