Procedure and devices for the placement of submerged channels of great length (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the object of the patent no. 251,451, requested on august 14, 1959, for procedure and devices for the placement of submerged pipes of great length, characterized in that the channeling elements during the operations of dragging, splicing and laying remain full of air at normal pressure. (Machine-translation by Google Translate, not legally binding)