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Solar panel
CA ETRC P237-001-001-080 · Part · 1979
Part of Barbara Verity fonds

The item is a negative of a solar panel use to demonstrate the heating capacity of the panel.

Solar panel
CA ETRC P237-001-001-079 · Part · 1979
Part of Barbara Verity fonds

The item is a negative of a solar panel use to demonstrate the capacity of the energy it produce.