4. Electric heating
  5. Metal heating
  6. Of cylinders

Arie P. van den Berg

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Device for welding tubes

Electric heating – Metal heating – Of cylinders
Patent

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Method and a device for introducing a tubular assembly into the

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
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Soil investigation device

Measuring and testing – Hardness – By penetrator or indentor
Patent

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Profile ID: LFUS-PAI-P-591678

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