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hallo microphone / microphone

hallo microphone
hallo microphone

This is a microphone connected to the electrical lines, we now use mostly the lines of the paper, in many cases the microphone and paper have occupied our hands is very inconvenient to use them, and now we just use a simple hand operation, you can get the information we want!

University

Wuhan University of Science and Technology

Wuhan University of Science and Technology
Wuhan city, China

Design

Wuhan University of Science and Technology

Wuhan University of Science and Technology
Wuhan city, China

Mao Rong