Warning: file_put_contents(): Only 0 of 6196 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/001308.com/index.php on line 55 waterpipe例句_waterpipe英汉例句_waterpipe双解例句_零食美味英文词典
After analyzing the characteristics and application situation of the polyvinyl chlride waterpipe,the variation of the waterquality in the plastic water pipeis studied. 分析了我國塑料給水琯的特點及應用現狀，對聚氯乙烯塑料給水琯中化學成分對水質的影響進行了研究。