Details of side platforms of drill carriages which fold down against frame before rig is moved.
Drill-carriage wings held up by toggle braces
Eng News-Rec
Engineering News-Record ; 115 , n 24
1935
Article (Journal)
English
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Engineering Index Backfile | 1948
|Switches, Toggle, Electrically Held, Sealed, General Specification For
SAE Technical Papers | 2013