液体散货用泵装卸的。（） A: ALiquid cargo is loaded and discharged by pumps. B: BLiquid cargo is loaded and discharged by tubes. C: CLiquid bulk cargo is loaded and discharged by tubes. D: DLiquid bulk cargo is loaded and discharged by pumps.
液体散货用泵装卸的。（） A: ALiquid cargo is loaded and discharged by pumps. B: BLiquid cargo is loaded and discharged by tubes. C: CLiquid bulk cargo is loaded and discharged by tubes. D: DLiquid bulk cargo is loaded and discharged by pumps.
The engine has one or two group of fuel pumps， depending upon （）.
The engine has one or two group of fuel pumps， depending upon （）.
The ships’ generator broke down, and the pumps had to be operated ________ instead of mechanically.
The ships’ generator broke down, and the pumps had to be operated ________ instead of mechanically.
Thermal printers use heat elements to produce images on heat-sensitive paper and are used at ATMs and gasoline pumps.
Thermal printers use heat elements to produce images on heat-sensitive paper and are used at ATMs and gasoline pumps.
词汇与结构 The engine driven pumps are used in main hydraulic ________ systems.
词汇与结构 The engine driven pumps are used in main hydraulic ________ systems.
The oil is drawn from a drain tank through （）， one of a pair of pumps， into one of fine filters.
The oil is drawn from a drain tank through （）， one of a pair of pumps， into one of fine filters.
The ship’sgenerator broke down and the pumps _____ ( 不得不用手工进行操作 ) instead of mechanically.
The ship’sgenerator broke down and the pumps _____ ( 不得不用手工进行操作 ) instead of mechanically.
What did he sell in this business? A: Electronics parts. B: Computer software. C: Electric pumps. D: Machine tools.
What did he sell in this business? A: Electronics parts. B: Computer software. C: Electric pumps. D: Machine tools.
Where is not in the engine room? A: main engine B: auxiliary engine C: pumps D: steering gear
Where is not in the engine room? A: main engine B: auxiliary engine C: pumps D: steering gear
Depending on the power sources, pumps used in hydraulic system are divided into engine driven pump, electrically driven pump and hand pump.
Depending on the power sources, pumps used in hydraulic system are divided into engine driven pump, electrically driven pump and hand pump.