7° Coal Mining Shank 22 mm Rock Hex Rock Drill Rod


The phrase described above is about a drill rod specifically designed for coal mining. Here’s the translation of the explanation into English:

In summary, the phrase described a hexagonal rock drilling rod with a specific taper and dimensions, specifically designed for coal mining applications. This type of drill rod plays a crucial role in coal mining operations, especially in drilling holes in rock strata.

taper drill rod


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