1. Seedbed preparation: The greenhouse seedlings in autumn and winter sunlight greenhouses are in high temperature and rainy season. The nursery beds should be protected against rain, ventilation, and temperature drop conditions. The seedlings that have been cultivated under the conditions of film coverage must be able to adapt to the greenhouse conditions. It is best to choose a dry, well-ventilated section with an arch shed of 1.5 to 2 meters in height, 1 meter to 1.5 meter wide nursery hoe in the shed, and 20 kilos per square metre of farm manure. Turn 10 cm deep and flat. In order to avoid the high temperature of the glare, it is better to set the shade net or use other methods to shade and cool.
2, sowing: seedlings and lotus root irrigation water, water infiltration, according to the spacing of 10 cm to 12 cm hole sowing, sowing 2 to 3 seeds per hole, covering 1 cm thick nutritious soil. Keep the surface wet before emergence.
3. Seedling management: A robust seedling is kept in each hole after emergence, and the rest are cut off. Avoid drought during seedlings and keep it dry. Spraying an anti-caries agent every 7 days to prevent the transmission of virus disease. There are 4 to 5 leaves in about 30 days of autumn and winter tomato seedlings. Plant height 20 cm to 25 cm age seedlings.
HEPA filters
Describe:
High-efficiency Air Filters are mainly used to trap dust and suspended matter below 0.5um. The air purifier mainly consists of two parts: the filter core and the shell .
The basic requirements are high filtration efficiency, low flow resistance, and can be used continuously for a long time to reduce the cost of later consumables.
The filter element is the air filter, and the high-efficiency air filter plays an important role in the air purification industry.
Characteristics:
Using ultrafine fiberglass paper as Filter Material, offset paper, aluminum film and other materials as partition board, glued with wood frame aluminum alloy, using special silicone rubber, no smell, no surface hardening, no crack for a long time, stable chemical properties, Corrosion resistant, can absorb the stress produced by thermal expansion and cold shrinkage without cracking, soft and hard, elastic recovery.
Each set is tested by sodium flame method. It has the characteristics of high filtration efficiency, low resistance and large dust capacity.
Applications:
High efficiency air filters can be widely used in optoelectronics, LCD liquid crystal manufacturing, biomedicine, precision instruments, beverage and food, PCB printing and other industries dust-free purification workshop air conditioning terminal. High efficiency and super high efficiency filters are used at the end of clean room. According to their structure, they can be divided into three types: high efficiency with partition board, high efficiency with no partition board, high efficiency with large air volume, super high efficiency filter and so on.
Hepa Air Filters,Hepa Filter,Intermediate Air Filters,Medium Effect Air Filters
Henan Sinofiltec Technology Co.,Ltd , https://www.airfilters.pl