51

Automatic systems of controlling gas consumption

Year:
1980
Language:
english
File:
PDF, 206 KB
english, 1980
54

An electrical contact level gauge for glass

Year:
1977
Language:
english
File:
PDF, 355 KB
english, 1977
55

An automatic pressure control system for a group of furnaces

Year:
1983
Language:
english
File:
PDF, 194 KB
english, 1983
58

Differential device for determining optical distortions in plate glass

Year:
1980
Language:
english
File:
PDF, 238 KB
english, 1980