硬塑料管 meaning in Chinese

hard plastic tube

In the irrigation works , the plastics pipe is used in many areas . with the development of technology of low pressure pipe in the irrigation , we need to manufacture new plastics pipe which is used in the irrigation system
在水利工程中，塑料管材的应用也很广泛，随着低压管道输水灌溉技术的发展，需要研制出适用于农田管道输水系统的轻型薄壁硬塑料管，以降低管材的造价。
It offered a preliminary research based on the field experiment to study the mechanism of how to increase yield by water filtration irrigation in a technological way . the pinhole rigid plastic tube was used to improve the cost to efficiency ratio
试验主要通过田间试验，结合一定的技术分析方法，初步研究了大田玉米渗灌技术的节水增产机理，试验采用成本低易普及的针孔硬塑料管，以提高效益成本比。