Antiskid musical instrument base

The utility model comprises a base whose middle part is provided with a through hole. The upper part of the through hole is expanded with a big hole and the joint face between the big hole and the through bole is a pyramidal face. The utility model comprises a ball head bolt which comprises a ball h...

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Bibliographische Detailangaben
1. Verfasser: JUNGANG HU
Format: Patent
Sprache:eng
Schlagworte:
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