Abstract: An electronic apparatus includes a housing comprising a plurality of holes on a first side wall, a transparent dust-proof member installed on a side of the first side wall having the plurality of holes, a motherboard may be installed on a second side wall inside the housing having a processor installed on the motherboard inside the housing for processing programs and data and a memory for storing programs and data. The transparent member allows visual inspection of the interior of the housing. The plurality of holes provides electromagnetic shielding.

Abstract: A device for reducing electromagnetic interference is adapted for use in a processor assembly that includes a circuit board with opposite first and second sides, a processor socket mounted on the first side of the circuit board and connected electrically to the circuit board, a central processing unit having a heat-dissipating side and a contact side that is opposite to the heat-dissipating side and that is mounted on and connected electrically to the processor socket, and a conductive heat sink in contact with the heat-dissipating side of the central processing unit. The device includes a grounding spring plate having a first end portion adapted to contact the heat sink and a second end portion adapted to be mounted on the circuit board so as to connect electrically with a ground terminal of the circuit board, thereby establishing electrical connection between the heat sink and the ground terminal.

Abstract: A double-acting hydraulic cylinder consists of a cylindrical body having an inner wall and an outer wall and a piston rod attached with a piston movably mounted within the inner wall and dividing a space within the inner wall into a rear chamber and a front chamber. A rear seat is mounted on a rear end of the body and defines a first bypass communicating a first space between the inner and outer walls with the rear chamber. A front seat is mounted on a front end of the body. A block is mounted between the piston and the front seat and defines a second bypass communicating the first space and the front chamber. The front seat defines a first control channel and a second control channel which communicate with each other at a common end and a communication conduit in communication with a communication tube in communication with the rear chamber.

Abstract: A double-acting hydraulic cylinder for use in an exercising apparatus to provide a resistance to a user of the exercising apparatus is disclosed.

Abstract: A double-acting hydraulic cylinder consists of a cylindrical body having an inner wall and an outer wall and a piston rod attached with a piston movably mounted within the inner wall and dividing a space within the inner wall into a rear chamber and a front chamber. A rear seat is mounted on a rear end of the body and defines a first bypass communicating a first space between the inner and outer walls with the rear chamber. A front seat is mounted on a front end of the body and defines a second bypass communicating the first space and the front chamber and a first control channel and a second control channel which communicate with each other at a common end by a communicating channel in communication with the first space.