Replaceable Pre-Cutting Bit
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Replaceable Cutter Bit is one kind of Pre-cutting Bit. It can be installed in the Roller Disc Cutter Holder to replace Roller Disc Cutter in smaller-diameter gravel or intensely weathered rocks conditions. Replaceable Cutter Bit and Roller Disc Cutter are spaced or alternated with each other in complex ground, so that Cutter Head can keep best composition during tunneling.