New vacuum valves and their applications
By: by Dr. A. W. Hull ...
Published: 1932
Place of publication: Place of publication not identified]
Language: eng
Number of pages: 11
Subjects: Vacuum-tubes
Other titles: Vacuum valves
Notes: Caption-title.

Multigraphed.

"This paper was delivered ... at the meeting of the American institute of mining and metallurgical engineers at Buffalo, N.Y., on October 6, 1932."