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1976-07-16
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1950-03-15
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1989-03-16
Method and device for manufacturing mesh film
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1966-09-06
Axial extruder head with mandrel for extruding hollow profiles
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1969-08-19
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1964-03-03
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1967-10-31
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1977-11-30
Method and apparatus for manufacturing a hollow plastics article
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1968-08-07
Method of, and apparatus for, producing a foamed thermoplastic product