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Description of tunnel driving shield of simple design, developed on Pittsburgh sewer tunnel, consisting of two ribs and skin plate propelled by screw jacks and riding on carriages equipped with jack controls; shield operation.
Description of tunnel driving shield of simple design, developed on Pittsburgh sewer tunnel, consisting of two ribs and skin plate propelled by screw jacks and riding on carriages equipped with jack controls; shield operation.
Simple shield drives sewer tunnel
Eng News-Rec
Mascaro, P.J. (author)
Engineering News-Record ; 126
1941
2 pages
Article (Journal)
English
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