日本中文字幕在线观看,少妇A级裸片AAAAA八戒,六十路70路老熟女A片免费看,亚洲成人在线视频

The springing ball of rotary screen is an indispensable part of the rotary screen. When the rotary screen is working, it is constantly bouncing up and down under the force of the punching plate, and repeatedly knocking on the screen, so as to help achieve the purpose of cleaning the screen and improving the mesh penetration rate.

The size of Silicone bounce is φ 10, φ 15, φ 20, φ 25, φ 28, φ 30, φ 40, etc.