| 摘要 |
<p>The mounting base has fixed sections at the front and rear with support fixings (2,3) and a central platform (1) on which the fixings can be longitudinally adjusted. The couplings (4) between the supports assure a longitudinal displacement of the supports symmetrically relative to a transverse axis of the base. There are guides (7,23,8,33) for the fixing supports and stops (5,6) for the supports on the base. The base platform has a transverse aperture (13) which matches with apertures formed in the fixing supports so that a lug (4) which fits without play in the apertures so that lateral movement of one support causes symmetrical movement of the other support.</p> |
