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 modal dalay模时延差differential colorimeter差示比色计differential dose albedo微分剂量反照率differential area piston差动活塞differential signal line差动信号线differential land policy差别化土地政策differential accumulator差动储压器,差动蓄水器differential change gear差动变换齿轮differential capacitance微分电容differential calorimetry差示量热术