Turn over and roll over spring and have release bearing unit of rolling over spring in this reverse side
The utility model relates to a turn over and roll over spring and have release bearing unit of rolling over spring in this reverse side. Roll over the spring including turning over, still include outer lane, inner circle, sealing washer, steel ball, holder, fixed plate, well core housing, the outer...
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Format: | Patent |
Sprache: | eng |
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