The cork cover is on the liftingrod and is tightly matched with the rubber sleeve.
提升杆与锥形塞通过丝扣连接，塞盖套在提升杆上并与橡胶套紧密配合；
2
The upper end of the liftingrod is provided with the shaft sleeve and a button which are connected with the eccentricity handle.
提升杆上端装有与偏心把手连接的轴套和按钮。
3
The rocker arm is connected with the balance weight block through a rotary shaft, a cam, a pulley, a steel cable and a liftingrod, and an initial position can be selected through a barrier shaft.