Disclosed is a hydraulically setting composition containing phosphorus-oxygen acid esters or ester salts which comprise alkoxy groups. The frame assembly preferably includes a main frame and a sub-frame, which is movable relative to the main frame and configured to carry the rear wheel. To ensure that the target rate is appropriate for a particular building, the target flow rate is determined based on a ventilation setting that reflects a specified number of bedrooms and a specified amount of floor space of the building. The entries comprise user entries and role entries. An encoding center at the remote location processes the images to obtain mail processing data from the images. The rotational speed feedback control unit changes a feedback gain in response to the rotational speed signal.