roadheader: 1.big capacity and high working efficiency 2.easy maintainence and easy operation 3.low consumption and roadheader:Main feature : the structure is compact, the main body of the machine is short .center of gravity core is low ,easy operation,it is very stable when working. cutting bits of Φ700x550 or Φ750x550 can both be used in the machine,the cutting speed is good when it mines the ...