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Car-mounted station, transfer station base station: how to match the repeater duplexer?

Vehicle-mounted station and transfer station base station: no power, what is the problem of short transmission distance?

The difference between digital walkie-talkie and analog walkie-talkie

How to use the radio

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Main products: activated clay, drilling mud, casting grade bentonite, montmorillonite, inorganic gel, bentonite cat litter