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customized electronic chalk board
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Capacitive nano blackboard slate electronic blackboard writing teaching smart board suitable for schools This Blackboard Is A Digital Interactive Tool ...
2026-06-19 00:10:28
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...-precision, anti-interference infrared transmitting tube and a set of infrared receiving tubes, which are installed on a highly integrated circuit ...
2025-04-05 13:28:41
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...electronic circuit integration product. The infrared touch screen contains a complete integrated control circuit, a set of highly anti-interference ...
2025-04-05 13:28:42
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..., anti-interference infrared transmitting tubes and a set of infrared receiving tubes, which are installed in two opposite directions on a highly ...
2026-06-19 00:10:28
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