Abstract: A relay device includes: communication circuitry; and processor circuitry coupled to the communication circuitry, the processor circuitry being configured to perform processing including: first communication processing to receive a plurality of signals from a first wireless communication device via the communication circuitry; communication control processing to allocate, to each of the plurality of signals received by the first communication processing, a corresponding transmission timing and beam used for wireless communication; and second communication processing to transmit each signal to a second wireless communication device via the communication circuitry by using the beam allocated by the communication control processing, at the transmission timing allocated by the communication control processing, wherein the communication control processing includes receiving first information that includes a beam index indicating the beam.

Abstract: A vehicle weight measurement device includes a moving body, an attachment body, a stopper ring provided between the moving body and the attachment body, and a rotation prevention part configured to prevent the moving body and the attachment body from rotating relative to each other. The stopper ring includes a fixing part fixed to one of the moving body and the attachment body and a separation and detachment prevention part provided at the other of the moving body and the attachment body and configured to prevent the moving body and the attachment body from separating and detaching, without inhibiting movement of the moving body. The rotation prevention part includes a pin fitted from the moving body to the attachment body.