lens.org 参考文章(4)
Patrick D. Gaukel, Steering column support assembly ,(2001)
Keegan Roach, Single point friction lock for tilt and telescope adjustment of steering columns ,(2010)
Janet Baumann, Burkhard Schafer, Steering column assembly unit ,(1997)
Erik Rydsmo, Lennart Hallenberg, Steering column adjustment mechanism ,(2011)