短语词组短語pilot oil hole 先導油孔pilot -hole interconnetion 導曏孔對接Pilot t hole 安裝孔pilot hole of shaft 井筒檢查孔pilot hole grouting agent 錐探灌漿pilot hole pp 預先導孔pilot hole pp 2 預先導孔Blind pilot hole 盲導孔 返回 pilot hole