air exhaust opening的用法和樣例：
例句
- Stand clear of the regulator and valve outlet, while opening the valve.
開啟閥門時，躲開調整器和閥門排氣口。 - This process involves shooting carbon dust into smokestacks.The dust binds to the mercury, forming particles that can be sifted from the exhaust.
這種處理過程是將碳塵射入煙囪，讓它與汞在其中結合，形成在排氣口即可篩去的微粒。
