The complete cycle of an engine requires four piston strokes: intake, compression power, and exhaust.
发动机完整的循环要求有活塞的四个冲程:进气、压缩、做功、排气。
2
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.