differential cam差分凸轮differentialadj.差别的；特定的；微分的n.差别；工资差额；差动齿轮；[数]微分differential thermometer示差温度计,双金属温度计,差示温度计,微差温度表differential amperometry示差电流滴定differential phase error微分相位误差differential conductance微分电导differential rate method[经] 差别比例法differential lubricatant差速器用润滑油differential shunt motor差并励电动机,差绕并励电动机differential gain contrl[电] 差动增益控制器differential measurement较差测量differential draft gauge差示通风计