The first chapter introduces the writer of The Dream Shadow of Red Chamber, and on the base of verifying, states her life experience and the background of creating The Dream Shadow of Red Chamber.
The paths of the corrosive gas can be a hollow cavity formed in the foreign substrate base bar, the hollow cavity and the nitride reacting chamber are separated by the foreign substrates.
The changes of the pressure in puffer chamber and nozzle throat under different base pressure are compared, which shows that base pressure has an influence on the pressure in gas chamber.