91蜜臀福利色婷婷,国产成人精品av在线,美女又爽又黄大尺度,精品久久久久久久久久久久久久久久,日本精品成人,综合网久久,国产精品乱码久久久久久

Because the program design of prepaid water meters is different in different manufacturers, the operation method of prepaid water meters of different brands may not be exactly the same. Here can only describe the common situation.

1. Insert the user's card into the water meter (for the RF card, put the card close to the card reading area), and the LCD screen displays the user's current remaining water and cumulative consumption information.

2. Some pre-paid water meters have a query/display button on the controller. When users want to query the usage of the pre-paid water meter, they can query the water quantity information through the "Display" button on the controller.