Gas-dispersing apparatus for multiple chemical resources

A gas dispensing apparatus for multiple chemical resources, comprising:

• a gas mixing chamber with a first board body and a second board body separated with each other and outwardly extending from the gas mixing chamber, wherein the gas mixing chamber having multiple holes defined therethrough, and the first board body has a diameter less than that of the second board body;
• and
• a stepped body configured to receive the gas mixing chamber, such that when a first inner horizontal surface of the stepped body touches against the first board body and a second inner horizontal surface of the stepped body touches against the second board body, two separated gas cavities of different diameters are formed between the stepped body and the gas mixing chamber, and the two gas cavities are in flow communication with the gas mixing chamber via the holes.