伊人中文字幕无码专区_亚洲欧美日韩国产综合v_久久人妻无码一区_有码 无码 人妻中文

Tangshan Qianxi Water Company uses Jingda wireless remote water meters. They are installed underground, from one meter to 1.5 meters deep. They use wireless ad hoc network routing technology, and the meter reading success rate and accuracy rate are >99%.