resistance n. 1.抵抗,反抗,抗拒,抵御;敵對,抵抗力,反抗力,阻力,【生物學】抗病性。 2.【電學】電阻;阻抗;電阻器。 electric resistance 電阻。 abrasive resistance 耐磨力[度]。 dead resistance 吸收[消耗,鎮流]電阻。 passive resistance 無源電阻;消極抵抗。 a piece of resistance 主要品,壓軸,出類拔萃的東西;主菜,壓桌菜(=pièce de résistance)。 make some [no] resistance 進行[不]抵抗。 offer [put up] resistance to [against] 抵抗。 resistance welding 電阻焊接,電焊。 take the line of least resistance 采取阻力最小的路線;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 指出雙速電動機用于輸油泵的調速時,應選用轉矩按轉速平方降低特性的電動機;調速泵的運行經濟性受到管路阻力特性曲線的限制,其調速范圍受到管路阻力特性曲線、系統所需揚程和泵運行特性的限制;在母管制系統中把部分定速泵改為調速泵時,應將性能較高的定速泵改為調速泵。