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Advanced Television
2 天
China outlines Beidou constellation
China already has a total of 44 GPS satellites in orbit (at the end of 2023), known as the Beidou constellation. The ...
Nature
27 天
HYPERFREQUENCY ELECTROMAGNETIC WAVES AND THEIR PRACTICAL USE
Brillouin has studied the behaviour of electromagnetic waves of which the lengths are comprised between approximately 1 cm. and a few decimetres.
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