Warning: file_put_contents(/www/wwwroot/zidian/biehu.cn/cache/3be7b4eefe223019b1c0c40244f43a8a.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/biehu.cn/index.php on line 58 waterpipe例句_waterpipe英汉例句_waterpipe双解例句_甲百汇小鸡词典
After analyzing the characteristics and application situation of the polyvinyl chlride waterpipe,the variation of the waterquality in the plastic water pipeis studied. 分析了我国塑料给水管的特点及应用现状，对聚氯乙烯塑料给水管中化学成分对水质的影响进行了研究。