Grind plate with removable inserts
作者： Brent James
DOI:
关键词:
摘要: A grind shoe apparatus incorporating a variable friction plate complementally received in the recess of sole and having downwardly facing trough an outwardly rail with respective slide surfaces for contacting support surface to therealong. Such further includes at least one speed control compartment positioned within such insert removably carried therein varying frictional resistance occurring during sliding maneuvers.
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