About
HSK levels

    气门 氣門

    qìmén

    1. valve (esp. tire valve)
    2. accelerator (obsolete term for 油門|油门)
    3. stigma (zool.); spiracle

    轮胎的气门需要定期检查。 lúntāi de qìmén xūyào dìngqī jiǎnchá.