Porcine respiratory syndrome consists of a variety of causes, including viruses (blue ear, circovirus, pseudorabies, flu), bacteria (porcine plague, swine streptococcus, pig paratyphoid, Haemophilus parasuis), mycoplasma, environment It is caused by interactions such as feeding management, …
Since China's security industry started in the 1980s, the scope of application has continued to expand. Especially after 2010, the scope of application has been guarded and developed by important units and key departments to the full prevention of business
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In order to reduce costs, businesses use a large amount of common benzene plates without flame retardants. According to the investigation, there are many problems in the external insulation materials of Lanzhou buildings, and there is no hidden danger of flame
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Stainless steel screw pump is the use of screw rotation to suction and discharge liquid. Stainless steel screw pump intermediate screw as the active screw, driven by the original idea of ​​rotation, the screw on both sides of the driven screw, with the active screw for reverse ro
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In order to fully implement the spirit of the Fifth Plenary Session of the 17th CPC Central Committee, thoroughly implement the scientific development concept, conscientiously implement the "National "12th Five-Year" Science and Technology Development Plan", summarize and
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In the general home decoration, the expenditure of paint only accounts for about 5% of the total cost of the entire home decoration, but it accounts for 80% of the entire decoration area, 100% determines the home improvement effect and home environment, and directly affects the family'…