将改进型桥式整流器串接或并接构成双重化变流电路，可用于大功率整流负载。
The modified bridge rectifiers are connected by series or parallel, to compose the double converter, that can be used to high power rectifying load.
采用电热化霜型带双重过热保护，杜绝因化霜失控导致冷库温度升高和发生火灾的隐患；
The use of electric defrosting type with double thermal protection, to prevent loss of control due to defrosting refrigerator temperatures and cause fire hazards;
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