Combined pontoon bridge and raft

Transportation – Watercraft or hull – Raft – float – or platform

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D02796686

REFERENCES:
patent: 135784 (1873-02-01), Davies
patent: 671502 (1901-04-01), Sultemeyer
patent: 3252173 (1966-05-01), Robinsky
patent: 4063320 (1977-12-01), Newmann et al.
U.S. War Dept., Technical Manual Pneumatic Pontoon Bridge, p. 29, No. 275 cop. 2.

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