Diamond core drill bit 1.OEM product,competitive price 2.offer faster penetration and long life 3.good quality,fast drilling Diamond core drill bit1.OEM product,competitive price2.drilling glass, ceramic, marble and granite stone3.good quality,fast drilling speed 30mm/minapplication:1.for drilling glass, concrete,ceramic, marble and granite stone,concrete and asphalt etc 2.Laser welded can keep ...
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