可调风门 adjustable damper

手调风门 hand regulating throttle

自动调风门 Automatic Damper

一次调风门 primary air regulator

调节风门 [机] [炉窑] damper ; air damper ; [机] control damper ; adjusting damper

调压风门 air door for pressure balance

滑动调风门 Slide gate damper

自动阻风门盖调到 automatic chock cover setting

烟囱调节风门 funnel damper