Ultrasonic-STS-Water-Meter-With-Free-Vending-System
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Ultrasonic-STS-Water-Meter-With-Free-Vending-System
The STS (Standard Transfer Specification) is an Open Architecture initially introduced in South Africa in 1993, for the transfer of electricity prepayment tokens. Subsequently published by the IEC (International Electro technical Commission) as an International standard IEC62055-41,51.
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