Letter to editor referring to note by writer describing method by which sunken ships, if not in too deep water, could be refloated; testimony to merit of writer's method is afforded by Patent No. 28,912 issued Dec 15 1913.
Refloating sunken ships
Engineer
Engineer ; 171 , n 4443
1941
2 pages
Aufsatz (Zeitschrift)
Englisch
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