FIELD: exhaust pipes of motor vehicles. SUBSTANCE: pipe is made of profiled metal strip twisted along helical line, the strip edge forming a screen overlapping the corrugation spaces. Screen is tightly applied to external pipe surface and has helical groove adjoining the radius portion of ridge of each corrugation. Edge is located above said groove. EFFECT: improved design. 1 dwg
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METHOD OF PRODUCING MULTILAYERED TUBES | 0 |
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Authors
Dates
1994-02-15—Published
1991-06-28—Filed