Locking base and bolt corrosion prevention protecting device with locking base
The invention relates to a locking base and a bolt corrosion prevention protecting device with the locking base. The locking base is of a hollow structure; an inner hole of the locking base is consistent with the outer surface of the lower part of a corresponding bolt corrosion prevention cover in s...
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Format: | Patent |
Sprache: | chi ; eng |
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