99视频这里有精品,四虎影视永久在线精品免费,国产三级成人,亚洲欧美一区二区三区久本道,亚洲香蕉伊在人在线观看9,欧美日韩国产综合一区二区三区 ,奇米影视777俺要去888

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.