黄色a视频,亚洲一级免费视频,国产大片黄在线播放,国产一级特黄aaa大片,国产1级片,国产一级毛片免,国产精品合集一区二区

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.