? 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