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>> 技術描述：

1、鉆頭零件號隨鉆孔直徑以及鉆孔條件變化
Button Bit part number varies according todrilling diameter and
drilling conditions

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