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Technology demonstration spacecraft

spacecraft used to demonstrate experimental technologies

Pronunciation
/tɛkˈnɒləʤi dɛmənˈstreɪʃən ˈspeɪskrɑːft/
/tɛkˈnɑləʤi ˌdɛmənˈstreɪʃən ˈspeɪsˌkræft/