Chengmai County, Hainan-supplying diesel oil (Lingshui County News) at present, spray-free plastic has been successfully used in side skirts, central control panels, DVD panels, glove boxes, sunshades, dashboards and other auto parts in the automotive field. Bioplastics bioplastics are produced by using original plants as raw materials, such as sugar cane and corn, under the action of microorganisms. Commonly used plastics are generally synthesized from petroleum products, which are often harmful to small molecules that do not fully react, while bioplastics are prepared into automobile interior parts for VOCs volatilization in large vehicles because of the use of renewable raw materials with low toxicity and low harm. In addition, this bioplastic can be decomposed to facilitate subsequent recycling, so it is a more environmentally friendly type of plastic.
It can reduce the harm of cold current, when the temperature in the shed is below ℃ for a long time. Mulch such as straw bag non-woven sunshade net should be covered in the greenhouse at night to prevent frost damage and adopt pot fire or furnace fire to temporarily heat up. Open fire should not be used when heating to prevent smoke damage, and a flue should be set up to keep harmful gases outdoors, focusing on the heat preservation and anti-freezing of vegetables and seedlings in the greenhouse. For eggplant seedlings which are in the early stage of raising seedlings, measures such as artificial light supplement and temperature increase can be taken to prevent freezing injury or excessive growth of seedlings; in cloudy and rainy days, the mulch should be properly removed.
The two symmetrical circular instruments under the sunshade arch of the first dashboard are simple and clear, while under the sunshade arch of the second dashboard is a large liquid crystal display screen to display satellite navigation, reversing radar, entertainment systems and various driving information. Due to the use of i-drive information control system, the center console looks very regular, not so many complicated buttons and knobs.
A shade arch shed was built in the field. The height of both sides of the arch shed should be higher than 25cm from the nursery bed and above 45cm in the middle. After covering the colorless plastic film, it is covered with about 65% sunshade net, and the edge is compacted to prevent air leakage and ventilation. When the temperature in the shed reaches or exceeds 40 ℃ during the day, remove the film at both ends or in the middle to reduce the temperature to prevent the seedlings from being burned by high temperature; do a good job of heat preservation and moisture preservation by compacting the edge of the shed in winter.
External shading mainly refers to covering the sunshade net on the outside of the greenhouse, which directly shields the solar radiation outside the greenhouse, which can effectively reduce the temperature in the greenhouse. At the same time, the external shading system can be active. with the continuous development of science and technology, there are more and more kinds of greenhouses, and greenhouses for cultivating all kinds of plants and organisms are also built, and a variety of methods are used to control the temperature in the heat preservation work. every week, when irrigation is carried out, the end of each drip irrigation pipeline is opened in turn, and the fine particles accumulated at the end of the eyedropper are flushed out with high-pressure water. The pipeline must be opened one by one to ensure sufficient pressure,
Application scenarios: motor, power system, seat, dashboard, center console, part of the body, front and rear doors, steering column, air conditioning system, skylight, sunshade, tail door and small parts. Lock the noise or leakage of cars, high-speed trains, aircraft, experimental silos, and other indoor areas, or be used to track drones and flight positions, etc.
Fifth, tea. Winter tea is in a dormant period, generally low temperature overcast and rain has a limited impact on tea, but if it encounters wind and freezing or extremely low temperature, it will affect tea tree winter and spring tea production in the coming year. According to the weather conditions, take measures to protect against cold and heat preservation according to local conditions. One is to cover and keep warm. Cover the tea cover with rice (miscellaneous) grass, sunshade net and so on before the cold air comes. The second is to build barriers and guard against the wind. The land easily affected by wind freezing, the windproof barrier was established in the windward place by using materials such as sunshade net in advance, which was higher than the 20cm of tea canopy and tilted to the direction of tea tree. The third is to restore the tree situation in time. For the heavily frozen tea garden, due to the appropriate tree system after the beginning of spring, it is better to prune rather than deep pruning, so as to strengthen the management of spring tea fertility.
Comprehensively do a good job in cold prevention and warmth protection, ensure that the three-layer thermal insulation cover of the inner and outer shed film and grass curtain is in place, and on this basis, add an inner arch shed apron, and use the abandoned agricultural plastic film or idle sunshade net in stock to cover the grass curtain or non-woven fabric, press the edge, cover it tightly, and set up a two-layer film in the greenhouse if possible. Dangerous shed or damaged and collapsed shed can harvest the vegetables in the shed and store them indoors in advance so as to reduce the economic loss as much as possible.