Client： Guangzhou Huasui Precast Concrete Co., Ltd. 
Date：2016/01

Φ4.1×0.25T×1.2L(6P/R)- double tappered  ring 2 set

Φ4.1×0.25T×1 L(6P/R)- double tappered  ring 1 set

Vibration method：Pnuematic vibration