High-tech intelligent greenhouse is generally equipped with facilities with high automation, such as external sunshade system, internal masking system, internal thermal insulation system, forced ventilation system of wet curtain fan, top ventilation system, heating system, power distribution / control system and so on. in the working process of intelligent greenhouse, managers input the data and control parameters needed for planting crops into the computer, the intelligent greenhouse can realize unmanned automatic operation and automatically control the greenhouse environment. To ensure the growth of crops.
After emergence, sunshade and heat preservation should be used to ensure the suitability of the seedling bed temperature to prevent the seedlings from burning when the temperature is too high in sunny days. The film should be watered once when the film is opened after the second leaf stage, and the light available fertilizer should be watered once after the temple during the third leaf period. Do a good job of weed control and spray carbendazim 1 or 2 times to avoid sudden disease.
The material is mainly shown in strong adhesion with all kinds of skin and skeleton materials, high pressure load, good shock-proof and anti-impact performance, and can eliminate vibration and noise. it is very suitable for making automobile dashboard, handrail core, headrest and sunshade. Because the semi-rigid PU foam is porous, it gives the dashboard good resilience, absorbs 50-70% impact energy, has high safety, heat resistance, cold resistance, firmness and durability, and has a good feel.
The importance of glass greenhouse. Temperature is the basic condition to ensure the normal growth of crops. Greenhouse is a thermal insulation agricultural facility for the normal and rapid growth of crops. Heat preservation is an important work in greenhouse agricultural production, so suitable covering materials must be selected. Generally speaking, glass greenhouse is better than glass greenhouse, glass greenhouse can play a decorative role in appearance, and the aging and damage problems of glass greenhouse can be relatively small compared with plastic greenhouse; in terms of performance, due to the complexity of the environment, glass greenhouse can resist various loads (wind load, snow load, etc.). Aluminum alloy (or stainless steel) + plexiglass, ordinary glass, low-cost bamboo ponds and plastic films with beautiful and durable, windproof, rainproof, sunscreen, heat preservation effect and cost, can also be equipped with sunshade and sprinkler system. Plants usually need plenty of light and better glass. Of course, the one-time investment cost of plastics is lower, but the later maintenance cost is also higher, and plastics are easy to age.
Shen Jianliang said that after the early online donation, 56% of the funds for the activity plan have been completed, and the relevant funds have been converted into 1000 cooling packages under the supervision of the Charity Federation and other departments. Each cool bag contains cool oil, honeysuckle, toilet water, sunshade cap, mung beans and other heat prevention and cooling products. Master Chen has been working in Tonglu for more than a decade and always receives love from the government, trade unions and all sectors of society every year, but he is particularly moved to learn that this cool bag is from online, caring people and enterprises from all over the country. While replacing the broken cool hat on his head and putting on a new sunshade hat, he inquired carefully about the operation of the public welfare project, saying that he could also make some contribution to society.
Automotive interior materials include single materials or laminated composites used in automotive interiors, such as cushions, seats, seat covers, safety belts, headrest, handrails, movable folding of all decorative linings on the roof (including door panels, side panels, rear panels, roof linings, instrument panels, instrument panels, indoor shelves or rear window panels, curtains, floor coverings, sunshades, wheels, covers, engine covers and any other indoor organic materials It includes materials such as packing buffers that absorb collision energy during a collision. The effect of flame retardant treated automobile sound absorbing cotton can not only absorb sound and insulation, but also play an important role in flame retardancy of the whole vehicle.
When the temperature decreases in winter, choose the plastic film with good transparency and strong insulation to cover the windows, doors and ceilings. When the outdoor temperature drops below zero, the windows and doors are covered with a layer of plastic film, and the ground is padded with rice chaff, rice straw or heat sources in the shed. However, attention should be paid to ventilation to prevent the occurrence of diseases. With the increase or decrease of temperature in spring and autumn, the plastic film should be opened or covered appropriately in time. Mainly do a good job of cooling in summer. When it is too hot, open all the windows and vents, turn on the electric fan to cool down when possible, and hang the sunshade net where the sun shines.