Ground source heat pump comprehensive utilization method

This project through technology research, research for the hotel, hotel, school and other buildings of ground source heat pump heating and cooling technology; hotel and hotel industry to explore alternative heating, heat pump system to optimize the match; through technology promotion and ap.......

Improve corn yield to increase planting density

First, the composition of maize yield per mu is the number of mu plants × the average per plant yield or the number of mu ears × the average panicle weight. Under the premise of stable yield per plant, the more acres, the higher the yield. Maize is a single-stalk crop, unlike.......