Simple design introduced by J. W. Isherwood for new and existing tonnage; advantages claimed for this type of steel hatch.
Isherwood steel hatch covers
Shipbldg. Shipg. Rec.,
Shipbuilding and Shipping Record ; 36 , n 23
1930
1 Fig.
Article (Journal)
English
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Engineering Index Backfile | 1931
Engineering Index Backfile | 1949
Engineering Index Backfile | 1949
Engineering Index Backfile | 1930
Engineering Index Backfile | 1941