A method and apparatus for finishing cured concrete floors using a riding trowel to which large diameter pans are rotationally secured, the pans having abraders releasably secured to their undersides. The turning signal includes a transmitting device attached to the handle for transmitting a wireless signal, a receiving device attached to the bicycle for receiving the wireless signal, and a light electrically connected with the receiving device for signaling an intention to turn the bicycle. The input section includes a length measuring device for measuring a length of a piece good which is to be received from a load-handling device of a storage and retrieval device and which is to be delivered to a rack. The MEMS structure also includes a semiconductor device layer, formed on the glass substrate layer, that includes a MEMS sensor. The two armrests are arranged at both sides of the seat assembly and the seat back assembly; an end of each of the armrests is pivoted to the crank, and another end of the armrests is pivoted to the seat back assembly. A control system is provided for controlling the operation of the ice-shaving motor, the agitator, and the agitator so that the contents placed into the beverage container are blended to a desired consistency.