Abstract: A game table having sound-amplifying effect includes a board, a plurality of supporting legs, and at least one speaker. The supporting legs are connected to the bottom of the board respectively. One of the supporting legs is provided therein with a resonating chamber. The speaker is received in the resonating chamber. With this arrangement, the sound generated by the speaker received within the supporting leg can be amplified by the resonating chamber to generate a uniform and powerful sound effect. Further, the speaker is received within the supporting leg and well protected without suffering damage easily.

Abstract: The invention provides a method of a cold plasma surface process for ferrous absorbent including the following steps. Firstly, a substrate is disposed in a vacuum chamber under a room temperature, and electrical energy is transmitted to the substrate; next, organic silicon monomer is added into the vacuum chamber under the room temperature; at last, the organic silicon monomer is deposited on the surface of the substrate by a plasma polymerization process to form a hydrophobic film on the surface of the substrate.