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16-Towards quality problems, what's the solution of YTL? Will YTL replenish or not?

Meter sales in China market, in 18 month since the day of delivery from storage deduct the time of repairing, waiting for repair due to part shortages and express, YTL ensure three guarantees of quality.

17-Now how many types of prepayment meter does YTL have?

Mainly there are 3 types: STS keypad prepayment meter, IC card prepayment meter, CPU card prepayment meter.