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Subject: flat, black plates One simple and inexpensive way of collecting solar energy is to use flat, black plates that absorb sunlight
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| большое спасибо ! |
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Subject: flat, black plates One simple and inexpensive way of collecting solar energy is to use flat, black plates that absorb sunlight
|
| плоские черные панели |
| большое спасибо ! |
| You need to be logged in to post in the forum |