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A comment on Systems and Cost Analysis for Nuclear Subterrene Tunneling Machine (1973) [pdf]. Parent comment

Re:Systems and Cost Analysis for Nuclear Subterrene Tunnelin... by anthonygarcia21 on Tuesday September 06, 2022 @07:40PM (#32744588)
Looks like they stuck a conical diverter onto the exhaust end of a solid-fuel Grad artillery rocket.
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