The use of hydraulic cylinder in hydraulic elevator, the part usually has five parts: piston and piston rod, cylinder and cylinder head, buffer device, sealing device and exhaust device.
An undercarriage buffer plunger in an airplane suddenly fractured during the process of reinforcing pressure, and a fragment of a floating piston was thrown out.
某飞机起落架缓冲柱塞在补压时发生突然断裂，同时弹出一小块浮动活塞碎片。
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Travel mechanism of each track consists of a variable two-speed piston motor, a planetary reducer and a parking brake, travel brake buffer valve is mounted on motor to reduce hydraulic shock.