The piston may be connected to the upper end of the connecting rod either directly (trunk piston type), or indirectly (crosshead type).

活塞与连杆上端的连接，既可以是直接连接(筒状活塞式)，也可以是间接连接(十字头式)。

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The transition pedal mechanism comprises a transition pedal, a gas spring, a cross rod, a connecting rod, and an upper and a lower sleeves of a movable rod.

所述过渡踏板机构包括过渡踏板、气弹簧、横杆、连接杆以及相互套接的活动杆上套管和下套管；

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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。

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