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introduction:
13 installed high-speed steel twist drill, drill bit sizes
(1) 1.5 2 2.5 3 3.2 3.5 4 4.5 4.8 5 5.5 6 6.5mm
(2) 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8mm
according to customer requirements for inserting other materials and surface treatment of twist drill
this suit for rolling edge cleaning white diamond
this suit for rolling edge cleaning titanium
drill
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