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Television Receivers, Monochrome - Pt. 1 (ca. 1928-1938)
Early Experimental Television (ca. 1927 - 1937)
Tubes, Iconoscope
Tubes, Kinescope Picture (ca. 1927-1945)
Detail of tire for cement kiln, Pacific Portland Cement Co.
Wrought iron safety carriage, Avery Rock Salt Mining Co.
General plan of six wheel side tank locomotive, Pitot & Leroy
Saddle tank locomotive
Side tank locomotive, Muñiz y Olano
Locomotive, Imperial Taiwan Railways, General plan
Saddle tank locomotive, Luis Olano
Plain rigid pillow blocks, Link-Belt Company
Conical grooved cast drum
Chain oiling water jacket pedestal for fan
Safety elevator boots, Link-Belt Company
Double inlet steel ventilating fan
Double intake, reversible, steel ventilating fan
Maximum stresses for boiler
Wood lagged drum, Pioneer Mining and Manufacturing Company
Air compressor heads
Band brake and connections for 500 HP electric hoist
Nicholson's automatic engine stop
Tension carriage sheaves, Link-Belt Company
Cast iron grooved drum
Geared engine, Frick Coke Company

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