| 摘要 |
PURPOSE:To elongate life of dry type media by providing a strainer having ventilating property in a barrel tank to prevent the dry type media in the barrel tank from having high temperature. CONSTITUTION:When a drive wheel 10 is fixed and a motor 9 is started to rotate a main pulley 8, a barrel tank 6 with a strainer revolves together with a turret while rotating on its own axis. Namely, the contents in the barrel tank 6 are subjected to a work process like polishing by planetary turning. The barrel tank 6 is provided on its bottom with a strainer section 12 which forces the gas in the barrel tank and the air outside the barrel tank 6 may be prevented from having high temperature, resulting in elongated durability of the media. |
