equipment 不是不可数名词，而是集合名词。单数指同一种设备的集合；如果是不同种类的设备，就需要用复数形式 equipments。equipmentsn.装备;设备( equipment的名词复数 )
例句
Analysis of lightning prevention of primary and secondary equipments in power system
浅析电力系统一次、二次设备的防雷
Surplus equipment should be turned over to the higher authorities.
多余器材应该上交。
