♥ machine core：distinguished carbonization of 20CrMo 

     ♥ piston:carbonization

     ♥ conversionvalve:ground under high constant temperature 

     ensured stability through precision treatments

     ♥oil seal:synthetized by advanced PU and know-how adopted                             

    ensure hydraulic oil to form oil film so as

    to extend service cycle of pistons 

     ♥through bolt: GBPSC special bolt with high strength

     ♥drill rod: brilliant practicability & reliability

    special high-qualitied alloy

     ♥stroke: stroke extended、smooth reciprocating motion

    low rebounded rate 

     ♥shell:low-noised

     ♥shock protection system:patented technology product

     ♥special bushes of drill rod、high-efficient percussive frequency

    strong impact

     ♥patent number of shell：

                     ZL2011 3 0074070.9

                     ZL2011 3 0074067.9

                     ZL2011 3 0074048.4