Upper and lower ends of the hydro-cylinder identity are installed upper pressure board and down pressure board, which has piston rod and connecting stick.
复合式弯辊液压缸缸体的上、下端分别装有上压板和下压板组成油缸，里面装有活塞杆和连接杆。
2
The steel letters are pressed on the sign board arranged on the sign board platform through a piston-rod of a hydraulic pressure cylinder.
钢字通过液压缸的活塞杆被压到设置在标志牌平台上的标志牌上。
3
The drive cylinder, outer shell of built-in board brush, intermediate joint and sand collector are connected into stator;