短语词组短语rockbolt element 锚杆单元standard rockbolt 标准锚杆explosive rockbolt 爆固式锚杆grouted rockbolt 砂浆锚杆bamboo rockbolt 竹锚杆movable rockbolt 活锚杆local rockbolt 局部锚杆metal rockbolt 金属锚杆rockbolt mesh 锚网 返回 rockbolt