The historical origin of the water meter industry

Since the invention of a balanced tank water meter with instrument characteristics in Britain, Krolls has been developing water meters for nearly two hundred years since 1825. China's water meter use and production started late. In 1879, Li Hongzhang established the country’s fi

Effect of Water on Leaf Shedding of Euonymus japonicus

Effect of Water on Leaf Shedding of Euonymus japonicus As a landscaping material, Euonymus japonicus can not ignore its ornamental quality while controlling its growth. The leaves of Euonymus japonicus are green and extremely resistant to pruning, which is a common hedgerow species in t

Programmable controller application

1 control plan (1) Start a single air compressor in the control room and stop the operation. (2) After the operation of a single air compressor, the corresponding air compressor butterfly valve is linked. (3) The three instruments are started separately by the air compressor, and the starting