>> 技术描述：

1、钻头零件号随钻孔直径以及钻孔条件变化
Button Bit part number varies according todrilling diameter and
drilling conditions

2、与K4, DHD340A,COP44,QL340,Terranox4兼容
Compatable with K4,COP44,DHD340A,QL340,Terranox 4