4. Pipes and tubular conduits
  5. Flexible
  6. Spirally wound material

Kent Hultberg

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Apparatus for making a double-walled structure

Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting
Patent

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Double-walled structure and method and arrangement for producing

Acoustics – Sound-modifying means – Muffler – fluid conducting type
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Double-walled structure in a ventilation duct system

Pipes and tubular conduits – Flexible – Spirally wound material
Patent

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Method for producing a double-walled structure

Metal working – Method of mechanical manufacture – Gas and water specific plumbing component making
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Profile ID: LFUS-PAI-P-439670

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