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Drill Bit SR28


钎头-球型截齿
BUTTON BIT - Spherical buttons
直径(mm)
Diameter
33333537383841424551
截齿数量
No. of buttons
7777777777
冲水孔
Flushing hole
side1111111122
centre1111111111
钎头-子弹型截齿
BUTTON BIT - Ballistic buttons
直径(mm)
Diameter
33353537384145



截齿数量
No. of buttons
7777799



冲水孔
Flushing hole
side11
11





centre1111133



十字型钎头
Cross-type bit
直径(mm)
Diameter
333537







冲水孔
Flushing hole
side222







centre111








Drill Bit SR28
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