短语词组短语rotproof finish 防腐加工Polypropylene pipage rotproof primer 聚丙烯管道防腐底漆Rotproof coating for pipage 输送管防腐涂料Rotproof coating for metal 金属防腐涂料Rotproof paint for shipping 船舶防腐漆Rotproof coating for underground pipeline 埋地管道重防腐涂料 返回 rotproof