Title:
Tunneling machine having suction exhaust means
United States Patent 3005627
US Patent References:
/0900950.html
- - 0900950

/1140673.html
- - 1140673

Mechanized production of solid fuel
- - 2606010


Inventors:
William, Tinlin
Publication Date:
10/24/1961
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Assignee:
William, Tinlin
Primary Class:
299/56
Other Classes:
299/18, 299/62, 175/102, 175/94
International Classes:
E21D9/10; E21D9/13; E21D9/12
Foreign References:
DE642865C