valve gear

短语

[机] 阀动机构

词形变化

valve gears 复数 valve gears

释义与例句

n.
  1. 1.

    The mechanism of a steam engine that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle.

    可数 不可数 工程