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materials (Technical materia (metals, wood, plastics, textiles, ceramics,…

- - - - Welding
      - Expansion and contraction
      - Fusibility
      - Thermal conductivity
    - - conductivity
      - insulators
    - - opaque
      - translucent
      - transparent
    - - elasticity
      - plasticity
      - malleability
      - ductility
      - hardness
      - toughness
      - brittleness
    - - impermeability
      - permeability
      - density
      - porosity