天平设计要保证质量分布均匀，采用特制滑环引出电信号，并且天平后端用支架支撑以减小振动。
In the balance design, even distributed mass is required, special slip ring is taken to get electric signal and fixed mount is used at balance rear end to eliminate vibration.
电加热部分由电线选型、滑环的固定和支架设计等组成。
Electric heating part is composed by the choice to the electric wires, fixing to the rolling rings and the design.
先拆下电动机的护罩、滑环、碳刷、刷盒、刷盒支架及短路环装置(有的电机无短路环装置)等全部零件。
Removing all parts of cover, rings, carbon brush, brush box, brush box shell and short circuit ring equipment (some motor have no short circuit ring equipment).
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