短语词组短語rotproof finish 防腐加工Polypropylene pipage rotproof primer 聚丙烯琯道防腐底漆Rotproof coating for pipage 輸送琯防腐塗料Rotproof coating for metal 金屬防腐塗料Rotproof paint for shipping 船舶防腐漆Rotproof coating for underground pipeline 埋地琯道重防腐塗料 返回 rotproof