Soil testing and formula fertilization technology is based on the investigation of fertilizers, fertilizers field trials and soil testing instrumentation laboratories, based on the performance of crop fertilizers, soil fertilizers and fertilizer effects, rational application of relev.......
The tailings discharge methods mainly include surface discharge, underground discharge and deep water discharge. In addition, at present, some mining areas actively use tailings to make harm to profit, and use tailings as bulk fillers or raw materials, which is actually the most active ta.......
In terms of the comprehensive strength of domestic pressure sensor companies, there are several deficiencies in the industries in China's industry: (1) The labor productivity of the company is low. Because the pressure sensor industry is a high-tech industry, the role of the low labor .......
The dewatering bin is an elevated reinforced concrete silo with a bottom and four sides inclined. The bottom inclined wall is separated by a certain distance, and the channel steel or I-beam is arranged, and the punched steel sieve plate is laid thereon, and the sieve hole is.......
Outside the production process and the complexity of the diversity of the mineral composition, the rare earth metallurgical production process in addition to producing various forms of rare earth products, will be accom.......
On September 25, 2015, China's internal combustion engine industry development summit forum was held at the Nanling Campus of Jilin University. Xing Min, executive vice president and secretary-general of China Internal Combustion Engine Industry Association, elab.......
At present, China has established 410 national environmental standards, covering the air, water, soil, noise, radiation, solid waste, and pesticides. Environmental quality monitoring, environmental quality weekly reports, daily reports, and forecast monitoring.......
Nitrogen sealing device is composed of nitrogen supply device and nitrogen discharge device of two parts. Nitrogen device by the pilot and the main valve is composed of two parts; nitrogen device by the pressure feedback micro-pressure control valve components. Nitrogen pressure is general.......
The machinery industry grew by about 15% in 2013. It will be higher than the growth rate of about 10% in 2012.