How many hours a day the pump needs to be operated depends on the season and how much water is needed for crops.
抽水机每天需要工作多久取决于季节以及作物需水量。The way that a pump works is used to illustrate how the heart sends blood around the body.
抽水机抽水的原理能够用来说明心脏怎样使血液周身循环。Just as with the parallel water pumps, the currents form these parallel generators will add together to make a total flow of 100 amperes.
正犹如并联的抽水机同样，这些个并联的发机电所孕育发生的电流将加在一路，以构成100安培的总电流。In warranty, Vendor should prepare at least a heater and a circulation pump in local inventory.
在担保方面，卖方应该在当地的库存里面至少准备一个热水器和循环抽水机。The side-stream pump suction usually is placed somewhere close to the supply to the heat load.
边-水流抽水机吸通常被某处放置在~的附近对热负荷的补给。I heard pumps operating within the ship, I felt the water lowering around me, and in a few moments the cell was completely empty.
我听到船内部的抽水机活动起来，我觉得我周围的水渐渐低下去，过了一会儿，小房中的水便完全排出去了。Pressure drops may signify when filtration in pumps or other equipment need to be changed or serviced due to clogging.
压力下降可能是抽水机或者其他设备中的过滤塞由于堵塞而需要更换或者维修。Bringing water from the town pump had always been hateful work in Tom's eyes, before , but now it did not strike him so.
在汤姆眼中，到镇上从抽水机里拎水，一向是件令人厌烦的差事，现在他可不这样看了。After the finish of the Robust beverage bottles and other Annex can produce a model of piston-type pumps.
利用喝完饮料后的乐百氏奶瓶及其它一些附件即可制作一个活塞式抽水机模型。