John Doe died in his bath, asphyxiated by the fumes from a gas water-heater.一名男子死于浴室中，死因是吸入燃气热水器中排出的气体导致窒息。Some appliances, for example a water heater, are connected to the full 240 V.有些用电设备(如煮水器)联接在240伏上.The company cam...
A down - hole autotracking well pumping unit different from the conventional pumping unit was designed.针对抽油技术的现状和存在的问题,设计了一种不同于有杆抽油方法的井下自动跟踪式抽油装置.It is autumn and they are pumping water out of the swimming pool.入秋了, 他们正在...