combination circuit meaning in Chinese

组合电路
组合线路

Apply the new type touch head structure to vacuum interrupter , make the product of trying on . the comparative test in combination circuit was carried on between the new touch head structure product and the original structure product . the result of test indicated that the vacuum interrupter based cup form horizontal magnetic field touch head structure has greater improvement in the performance of turning on current density than the original structure
将该触头结构应用于现行的真空灭弧室中,制成试品,在合成回路与原结构产品进行了比较性试验,试验结果表明,采用该杯状纵磁场触头结构的真空灭弧室其电流开断密度较原结构有较大的提高。