A communication control apparatus transfers received data from an external unit to a first memory unit, and at the same time transferring a header portion of the received data to a second memory unit, and performs addition operations the received data transferred to the first memory unit to obtain a checksum value of the received data. According to the invention, the diaphragm pump is characterized in that the circular clamping member is provided, on the circumferential edge thereof, with a flange that extends parallel to the plane formed by the clamping member. A synchronization control circuit is connectable to the primary winding while at least one load transformer is connectable to the at least one intermediate secondary winding. A third step involves maintaining the garment in the raised position by extending the strap through a neck of the garment and around the lower hem of the garment to form a loop and securing the strap to itself.