短语词组短語drill l jumbo 大型多鑽頭鑽機hydro -drill jumbo 液壓鑽車feed drill jumbo 長進給鑽車crawler mounted drill jumbo 履帶式鑿巖台車rotary y drill jumbo 廻轉式鑽車rotary drill jumbo 廻轉式鑽車;鏇轉式鑽車 返回 drill jumbo