A method is proposed for checking the alignment of body axes for parallelism, which method can be carried out in simple manner with low effort in auxiliary apparatus means and yet delivers highly accurate measurement results. In the method, a measurement beam L, preferably a laser beam, is emitted transversely...http://www.google.de/patents/US5430539?utm_source=gb-gplus-sharePatent US5430539 - Method and arrangement for checking alignment of body axes for parallelism
