4. The maintenance of the multi-span glass greenhouse building is mainly the maintenance of the skeleton structure. For the covering material, it is mainly anti-shattering and anti-aging ability, can resist the wind and the sun, and achieve the purpose of transparent heat preservation. How much is a mu of steel pipe in a multi-span greenhouse in Enshi? Therefore, to do a good job of reinforcement measures, once found that the leak should be repaired in time. In the greenhouse used, the film will be stained with dust, making the light transmittance greatly. Therefore, according to the pollution situation of each area, the greenhouse film of the multi-span greenhouse should be cleaned regularly to maintain the light transmission ability. Especially for overwintering plastic multi-span greenhouses, this work is very important at low temperatures in early spring. The cleaning time of the film should be carried out at noon on a sunny day and when the temperature is higher in the afternoon.
According to the different sliding mode, the thermal insulation structure of steel sleeve steel composite thermal insulation steel pipe in Shaanxi FRP winding thermal insulation steel pipe production enterprise can be divided into two categories: 1. Internal sliding: the thermal insulation structure is composed of working steel pipe, aluminum silicate, drag reduction layer, microporous calcium silicate, heat insulation layer, stainless steel fastening strip, aluminum foil reflective layer, polyurethane insulation layer, outer steel pipe and external anti-corrosion layer. The inner sliding type thermal insulation steel pipe is composed of steel pipe with conveying medium + composite silicate or microporous calcium silicate + rigid polyurethane foam plastic + outer steel pipe + glass steel shell anticorrosion protective layer structure. The heat preservation treatment technology of all kinds of pipe joints is mature and the quality is reliable. 2. External sliding type: the thermal insulation structure is composed of working steel pipe, glass wool thermal insulation layer, aluminum foil reflective layer, stainless steel fastening belt, sliding guide bracket, air insulation layer, external steel pipe and external anti-corrosion layer.
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– Crochet hook (appropriate size for the thickness of plastic bags)
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