短語詞組短語drill l jumbo 大型多鉆頭鉆機hydro -drill jumbo 液壓鉆車feed drill jumbo 長進給鉆車crawler mounted drill jumbo 履帶式鑿巖臺車rotary y drill jumbo 回轉式鉆車rotary drill jumbo 回轉式鉆車;旋轉式鉆車 返回 drill jumbo