Circular-truncated-cone-shaped anti-theft nut
The invention relates to nuts, in particular to a circular-truncated-cone-shaped anti-theft nut. The circular-truncated-cone-shaped anti-theft nut comprises a nut body and is characterized in that the nut body is of a circular-truncated-cone-shaped structure, tightening grooves which become deeper a...
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Format: | Patent |
Sprache: | chi ; eng |
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