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Drill bit SR28

钎头-球型截齿
BUTTON BIT - Spherical buttons
直径(mm)
Diameter
3738414345





截齿数量
No. of buttons
77779





冲水孔
Flushing hole
side11121





centre11113





钎头-子弹型截齿
BUTTON BIT - Ballistic buttons
直径(mm)
Diameter
3841








截齿数量
No. of buttons
77








冲水孔
Flushing hole
side11








centre11








十字型钎头
Cross-type bit
直径(mm)
Diameter
3841








冲水孔
Flushing hole
side14








centre11









Drill bit SR28
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