Glued seams and pneumatic tube: what they have in common

1. Step 1. Glued seams — is part of — Wetsuit. Taped seams.
2. Step 2. Wetsuit — uses — Thermal insulation. Insulation.
3. Step 3. Thermal insulation — is part of — Freezer. Polyurethane foam in the walls.
4. Step 4. Freezer — has part — Compressor. A compressor compresses the refrigerant.
5. Step 5. Compressor — is part of — Pneumatic tube. A pressure or vacuum blower.

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