True vertical laser
True vertical laser application for precision vertical alignment of large structures, using mercury mirror
Billman, K. W.↗
Engineering topics
Yaffee, M. A.
Publications and source records attributed to Yaffee, M. A..
White light laser
White light laser construction using Ar-Kr laser with suitable mixture and pressure of gases to provide equal output intensities of red, yellow, green and blue
Billman, K. W.↗