海(淡)水柜一般位于机舱,必须采用密闭式压力水柜,将水位的高低变为气压的高低,以高低压压力继电器作控制元件实现水位双位控制,其密闭水柜示意图与水泵自动启停控制线路,如图8-46所示。当水位低于H L 时,SA打到自动位置,合上QS开关后电机将______,若水位仍在H L 以下,按一下SB 1 后,电机将______。
【简答题】Dreiser’s novel _____, a commercial and critical failure when first published in 1900, was reissued in 1907 and won high praise for its grim, naturalistic portrayal of American society.