| http://www.w3.org/ns/prov#value | - Other systems utilize a compressed fluid, such as air, which is forced through the journal to the lower most inner portion of the cutter bit thus forcing the air or fluid upwardly and outwardly in the passageways between the journal and the interior of the cutter head where the bearings are located not only to cool the bearings but also to force any contamination which gets into the interior of th
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