resistance n. 1.抵抗,反抗,抗拒,抵御;敌对,抵抗力,反抗力,阻力,【生物学】抗病性。 2.【电学】电阻;阻抗;电阻器。 electric resistance 电阻。 abrasive resistance 耐磨力[度]。 dead resistance 吸收[消耗,镇流]电阻。 passive resistance 无源电阻;消极抵抗。 a piece of resistance 主要品,压轴,出类拔萃的东西;主菜,压桌菜(=pièce de résistance)。 make some [no] resistance 进行[不]抵抗。 offer [put up] resistance to [against] 抵抗。 resistance welding 电阻焊接,电焊。 take the line of least resistance 采取阻力最小的路线;采取最省力的方法。
It is indicated that , when a two - speed motor is used for driving oil transfer pump , the motor with the characteristic of torque reduction on square rotary speed should be chosen ; the working economy of the variable speed pump is restricted by the characteristic curves of pipeline resistance , and its speed control range is restricted by the pipeline resistance characteristic curve , the pressure head needed by the system and the working characteristic of the pump ; when several pumps work in parallel , the pump with better performance should be changed into speed - variable pump 指出双速电动机用于输油泵的调速时,应选用转矩按转速平方降低特性的电动机;调速泵的运行经济性受到管路阻力特性曲线的限制,其调速范围受到管路阻力特性曲线、系统所需扬程和泵运行特性的限制;在母管制系统中把部分定速泵改为调速泵时,应将性能较高的定速泵改为调速泵。