短語詞組短語Well perforated casing 有孔套管井well -casing protection 油井套管保護(hù)deep congeal well casing 深凍結(jié)井筒horizontal well casing 水平井套管oil well casing 油井套管oil -well casing 油井套管well casing starter 油井套管鞋Water well casing 水井套管Well casing window mill 發(fā)明名稱 返回 well casing