The present invention relates to the novel anhydrous crystalline forms I and II of 1-cyclopropyl-6-fluoro-8-methoxy-7-4-oxo-1, 4-dihydroquinoline-3-carboxylic acid which can be depicted as Formula. The pipe retaining member is bent in an L-shape, and its short plate is exposed on the underside of the mounting frame. The computer bus interface receivesprovides data tofrom a computer bus of a computer for use by the computer andor as provided by the computer.