pilot hole
短語詞組
- pilot oil hole 先導(dǎo)油孔
- pilot -hole interconnetion 導(dǎo)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(yù)先導(dǎo)孔
- pilot hole pp 2 預(yù)先導(dǎo)孔
- Blind pilot hole 盲導(dǎo)孔 返回 pilot hole