For this reason, the competent departments of agriculture and forestry in many places have issued various measures to require farmers to do a good job in the prevention and remediation of crops in order to deal with the “late spring cold.” For example, for the vegetable greenhouse, the relevant departments stipulate that “when the temperature in the greenhouse is below 0 ℃ for a long time, straw bags, non-woven cloth, sunshade net and other mulch should be added in the greenhouse at night to prevent frost injury and take basin fire or fire temporary heating. At the same time, open fire can not be used when heating to prevent smoke damage, it is necessary to set up a flue to discharge harmful gases outdoors. Strengthen the coverage in time to promote heat preservation and anti-freezing. ”
It is beneficial to the growth of spinach. If you encounter problems in the actual planting. Feel free to contact us. The steel bar is 25 centimeters high and the exposed wall is 6 centimeters. The greenhouse of the workshop is required to set up a workshop at one end of the greenhouse, leaving the door on one side of the gable, and the workshop should not be too high to avoid shading. The effect of the skirt wall is mainly wind shield, waterproof and fixed arch frame. The embedded parts of the skirt arch frame should correspond to the embedded parts of the back wall arch frame. The thermal insulation performance of the facility greenhouse is poor. Especially in summer and autumn, the lunchtime temperature is easy to be too high. Cover sunshade, roof cover sunshade, commonly used sunshade net and grass curtain, cover 2 layers of sunshade net on the roof, inner plastic film. The outer layer is about 15cm~20cm away from the roof, and hangs out the 15m~2m on both sides of the greenhouse to form an outer corridor to prevent direct sunlight on both sides, and the straw curtain is directly covered on the plastic film.
15. The crystal display can display the following data torque than the length of the main arm elevation, the actual hook load allows the maximum allowable lifting height, each relief valve in the hydraulic system can restrain the abnormal high pressure in the circuit, to prevent damage to the hydraulic oil pump and motor, and to prevent the system from being overloaded. Wire rope overwinding and overrelease protection device height limiting device angle indicator working arm limit position alarm protection system horizontal sensor hook anti-decoupling device anemometer 5) the control room adopts all-steel structure and is surrounded by toughened glass. the top and front windows are laminated glass. Equipped with sunshade, adjustable seat, wiper, electric control handle, torque display, digital display, various switch auxiliary remote control box operation assembly, air conditioning, electric fan, lighting, radio (optional CD player, mp3 player, car DVD), cigarette lighter, fire extinguisher and so on. The control room has a wide field of vision and spacious interior space.
It is always inevitable to park cars outdoors in summer. In the scorching sun, the temperature inside the car will rise sharply to 50, 60 ℃ or more, such as the damage to the dashboard and leather seats can be imagined. At this time, a windshield can save the car from “cauterization”. Sunshade panel is a kind of sunscreen with reflective surface. When the vehicle is parked, the sunscreen placed at the front and rear windscreen can reflect sunlight, which can not only reduce heat into the car, but also avoid strong sunlight exposure to dashboards and console panels. When choosing and buying, it is best to choose a folded sunshade, which can be folded and stored when the weather turns cool, which is not only easy to carry, but also easy to save. two。
When the sun shines on the sunshade, some of the heat will be blocked, and the ultraviolet light will be reflected by the aluminum foil. Car sunshade can prevent leather seats and dashboards from being damaged by ultraviolet rays. Direct exposure to the sun will make the temperature in the car as high as 70 degrees. Not only the shell of the central console is easy to deform, instruments and other equipment on the dashboard are also damaged by high temperature, such as aging components, pin soldering, etc., sunshade can effectively avoid direct sunlight.