1. Give the expression of the need that is satisfied by the product.


2. Create a sentence to explain the main function of the system.


3. Complete the power Chain.


4. By using the vocabulary given here, fill in the blank :


Control unit - Light sensor - Anemometer - Awning - Arm - Remote control - Motorized drum

                                           


5. Explain how the Decma Tollgate works.



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