1

Nondestructive testing of oil-well drill pipe

Year:
1977
Language:
english
File:
PDF, 203 KB
english, 1977
2

Influence of metal ions on coal and carbon oxidation

Year:
1993
Language:
english
File:
PDF, 340 KB
english, 1993
3

Thread-cutting tool for new types of pipe

Year:
1975
Language:
english
File:
PDF, 179 KB
english, 1975
4

Black coal vitrinite oxidation under various conditions

Year:
1994
Language:
english
File:
PDF, 529 KB
english, 1994
5

Impact-action tube-cutting saws

Year:
1972
Language:
english
File:
PDF, 195 KB
english, 1972
7

Cold oxygen plasma oxidation of coal

Year:
1990
Language:
english
File:
PDF, 142 KB
english, 1990
8

A new approach to the investigation of coal

Year:
1990
Language:
english
File:
PDF, 247 KB
english, 1990