UPVC造句怎么写

3、The operational principles of UPVC spiral pipe and its specific characteristics in water passing capacity, drainage noise and material cost are introduced.

5、介绍UPVC螺旋管的工作原理，及其在通水能力、排水噪音、材料成本等方面的独特之处，是今后住宅排水系统中的发展方向。

2、Research of the Design Parameter of UPVC Heating and Cooling Floor by Experimentation;

1、Specification for design and construction of UPVC pipeline for water supply in buildings

4、More and more UPVC drainage pipes have been put into application recently in China, yet the quality suffers due to the worker's unfamiliarity with the installation process.