n. thumbscrew
蝶形螺钉蝶形螺母 butterfly screw
蝶形头螺钉 fly-headed screw
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本实用新型公开了一种新型的钓杆支架。它由支承杆、支承板、调节片及螺钉、蝶形螺母等组成。
The utility model discloses a novel fishing rod support and comprises a supporting rod, a supporting plate, an adjustment sheet, screws and butterfly nuts, etc.
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