[B-4-7] Improvement of Processing Time by Utilizing Cover Plate in Gyro Barrel Finishing 〇Yugo Nakayama1, Yohei Hashimoto1, Takuma Ito1, Tatsuaki Furumoto1, Tomohiro Koyano1, Akira Hosokawa1 (1.Kanazawa University) Keywords:Polishing、Mass finishing、Processing time、Contact force、