crawler drill 中文意思是什麼
crawler drill
解釋
履帶式潛孔鉆機-
Application of pneumatic - hydraulic crawler drill in drilling open - pit blast hole
氣液聯動鑿巖鉆車應用於露天爆破穿孔 -
Model tc308 high pressure crawler type down hole drill rig for open use
中高風壓潛孔鉆機在中深孔鑿巖中的試驗應用
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