3. Each main exhaust pipe shall have one exhaust fan . 一个风机控制一个主要的排气管道。
1. a tube with a small bowl at one end; used for smoking tobacco
2. a long tube made of metal or plastic that is used to carry water or oil or gas etc.
3. a hollow cylindrical shape
4. a small fipple flute that is played with the left hand while the right hand is free to beat a tabor
5. the flues and stops on a pipe organ
6. a wind instrument; the player blows air into a bag and squeezes it out through the instrument v.
1. utter a shrill cry
2. transport by pipeline
3. play on a pipe
4. trim with piping