短语词组短语boring g rod set 钻杆装置boring g rod 钻杆;镗杆Boring tool rod size 镗刀杆尺寸boring rod set 钻杆装置trimming boring rod 微调镗杆boring rod clamp 管钳special boring rod 专用镗杆hollow boring rod 空心钻杆rod boring 钻杆钻进;钻杆 返回 boring rod