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  • Key points of column-free soilless cultivation in greenhouses

    Key points of column-free soilless cultivation in greenhouses

    1 Equipment materials Greenhouses use reinforced concrete arches, which do not require column supports. The interior is spacious and convenient for installation and various operations. The nutrient solution pond is located at one end of the greenhouse below the ground level, and a length of 3 me...
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  • The difference between hot rolled steel and cold rolled steel

    The difference between hot rolled steel and cold rolled steel

    First, hot rolled steel By definition, steel ingots or slabs are difficult to deform at normal temperature and difficult to process. Generally, they are heated to 1100-1250 ° C for rolling. This rolling process is called hot rolling. The termination temperature of hot rolling is generally 800-90...
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  • Tianjin LongLong Metal Products Factory :Type of rolled material

    Tianjin LongLong Metal Products Factory :Type of rolled material

    There are tens of thousands of various kinds of metal rolled materials required by various sectors of the national economy. Rolled materials can be divided into various steels and non-ferrous metals and alloy rolled materials such as copper, aluminum, and titanium according to the types of metal...
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  • What are the characteristics of metal rolling process

    What are the characteristics of metal rolling process

    Rolling is a pressure processing method in which a metal billet is passed through a gap (various shapes) of a pair of rotating rolls, and the material cross section is reduced by the compression of the rolls and the length is increased. Compression is the process of plastic deformation. By rolli...
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  • Classification and characteristics of color steel forming equipment

    First, the classification of color steel forming equipment Color steel forming equipment can be divided into many models according to the color steel plates produced. However, according to the use of the formed color steel plate, it can be roughly divided into wall panel materials and roof panel ...
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  • Deconstructing 6 key points of the 2020 photovoltaic industry

    Deconstructing 6 key points of the 2020 photovoltaic industry

    2019 will be reprinted. After undergoing a turning and folding cycle of falling and falling, the photovoltaic industry is about to usher in a meaningful 2020! 2020 will be the last year of the national “Thirteenth Five-Year Plan”, and it will be a year of recovery after the photovolt...
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  • Application of anti-backflow device in photovoltaic system

    In the photovoltaic power generation system, according to whether the photovoltaic grid-connected system allows power to be fed to the main grid through a distribution transformer, it is generally divided into a reversible photovoltaic grid-connected power generation system and an irreversible ph...
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  • New homes in California will be forced to install photovoltaics from 2020

    According to a report released by MRF, the annual compound growth rate of the global solar photovoltaic glass market is expected to reach 34% in 2018-2023. In 2017, the global solar PV market was US$4.5 billion, and it is expected to increase to US$19 billion by 2023. According to the requiremen...
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  • New Professional Design, Manufacturing, Sales Of Photovoltaic Stent Trackers And Other Companies.

    New Professional Design, Manufacturing, Sales Of Photovoltaic Stent Trackers And Other Companies.

    Tianjin Longlong Metal Products Factory has established a company specializing in the design, manufacture and sale of photovoltaic support trackers and flat single-axis tracking photovoltaic support. The company’s name is: Shengwei New Energy Technology Development (Tianjin) Co., Ltd.
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