unplasticized polyvinyl chloride fittings for drainage in buildings建筑: build; construct; erect排水: drain off water; drain away ...用: 40分钟跑完全程 run the course in 4 ...硬: hard; stiff; tough聚氯乙烯: polyvinyl chloride; Utryl; G ...下载手机词典可随时随地查词查翻译
