differential gap不可调间隙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 absorption optical density差分吸收光学密度differential absorption dye laser radar差动吸收染料激光雷达differential transparency of atmosphere不同层次的大气透明度differential temperature heat treatment差温热处理differential intermediate value theorem微分中值定理differential pressure water level gauge差压式水位计differential coherent phaseshift keying差分相干移相键控differential pressure control mechanism压力差调节机构differential holographic interferometry差分全息干涉计量术differential sliding clutch shift shaft差速器主动齿轮横轴