In general, all greenhouses collect solar energy in applications. You might think that a greenhouse should capture the maximum amount of solar energy and should be oriented to straight south. Not ...
In the 47th week of 2019 (2019.11.18-11.22), the national composite steel price index of Lange steel reached 149.8 points, up 2.79% from last week and down 3.63% from the same period last year.The...