一种旋转可控制的乒乓球发球机
Release time:2024-08-19
Hits:
- Affilication of Author(s):
- 艺术学院
- Type of Patent:
- 实用新型专利
- Service Invention or Not:
- no
- Application Date:
- 2015-01-19
- Authorization Date:
- 2015-06-03
- First Author:
- SZB
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