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25-
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Coal drill bit
Bit is to promote the coal ministry has the list of product, the hardness is divided into two categories, type I is suitable for soft rock drilling, Ⅱ type is suitable for hard rock and hard rock drilling.
Type: divided into dry type and wet type two kinds;
Specification: Ф 28/2, Ф 32/2, Ф 42/2;
Features: drilling speed, drilling range, time saving, energy saving, connecting method is simple, durable and so on.
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