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"DU SONGQING"
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"DU SONGQING"
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Adjusting structure of conference camera
by
DU SONGQING
Year of Publication
16.01.2024
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Passive linear array sound box with anti-seismic support
by
DU SONGQING
Year of Publication
03.10.2023
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Portable wired handheld microphone
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DU SONGQING
Year of Publication
05.09.2023
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Network junction box for computer in conference room
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DU SONGQING
Year of Publication
25.08.2023
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Power amplifier packaging device
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DU SONGQING
Year of Publication
03.12.2021
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Intelligent direct-current fan control system of audio power amplifier
by
DU SONGQING
Year of Publication
09.11.2021
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Digital power grid on-off identification circuit of audio power amplifier
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DU SONGQING
Year of Publication
09.11.2021
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Digital short-circuit protection device for audio power amplifier
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DU SONGQING
Year of Publication
09.11.2021
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Membrane-tensioned flat membrane sounding horn dust removal device
by
DU SONGQING
Year of Publication
14.07.2020
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Conference microphone with dustproof function
by
DU SONGQING
Year of Publication
10.03.2020
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11
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Foldable portable paper horn
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DU SONGQING
Year of Publication
10.03.2020
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Portable loudspeaker with waterproof layer
by
DU SONGQING
Year of Publication
08.11.2019
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Remote video conference camera convenient to adjust
by
DU SONGQING
Year of Publication
08.11.2019
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Portable karaoke microphone support
by
DU SONGQING
Year of Publication
08.11.2019
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Conference camera with protection structure
by
DU SONGQING
Year of Publication
08.11.2019
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Portable loudspeaker capable of accommodating microphone
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DU SONGQING
Year of Publication
08.11.2019
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Stereo rotating device for KTV special-purpose sound box
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DU SONGQING
Year of Publication
08.11.2019
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Earphone horn with dustproof net
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DU SONGQING
Year of Publication
08.11.2019
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External portable condenser microphone of computer
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DU SONGQING
Year of Publication
08.11.2019
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Portable loudspeaker for education
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DU SONGQING
Year of Publication
08.11.2019
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