我国华北平原地区地下水源丰富,解放以来井灌有了很大发展。在人畜力水车、动力水车的水车管方面,一般是采用镀锌铁皮制成的,这种水管的最大缺点是铁皮外表所镀的锌,容易被皮钱磨擦掉而生锈腐烂,一般三、四年就要更换一次水管。由于水车逐年增加,每年更新的水管亦相应的增加, The groundwater source in North China Plain is rich in our country. Since the liberation, there has been a great development in well irrigation. In the human and animal husbandry waterwheel, power waterwheel waterwheel, the general is made of galvanized sheet metal, the biggest drawback is that the water pipes plated zinc, easily rubbed off the leather money and rust rot, generally Three or four years to replace the water pipe. Due to the increasing number of water tankers, the annual increase of water pipes has also been correspondingly increased.