AU2206256A - Improvements relating to machines for covering a continuous length of tubing with two or more layers of threads helically wound around the tubing
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Improvements relating to machines for covering a continuous length of tubing with two or more layers of threads helically wound around the tubing
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Pirelli and C SpA
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Pirelli SpA
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Publication of AU212784B2publicationCriticalpatent/AU212784B2/en
AU22062/56A1956-10-02Improvements relating to machines for covering a continuous length of tubing with two or more layers of threads helically wound around the tubing
ExpiredAU212784B2
(en)
Pressing mandrel, slotted lengthways and coaxially arranged in a die, for the production of lead pipes with an intermediate wall running in the longitudinal direction