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