After the completion of the new greenhouse, the looseness of the steel pipes above the columns was an old problem due to the pressure of the shutters and grasshoppers. Many vegetable farmers use iron wire for fixing, but iron wire fixes the steel pipe, but it frequently rubs against the film in the greenhouse, resulting in a significant reduction in the life of the film. Recently, the reporter discovered in an interview in the Luocheng Street, Shouguang City that all the steel pipes above the pillars in the strong shed of the vegetable kingdom were covered with bamboo plates, which solved the contact between the east-west wire and the tied steel wire, and prevented the film from being damaged.
Cunuo Wang Guoqiang told the reporter: “Generally, after the steel pipes are tied around, they are laid with bamboo plates. The laid bamboo plates are 4-5 cm wide. When laying, a groove can be dug below the bamboo plate. In the east-west direction of the steel wire, usually a bamboo plate at least dug three grooves, so that the bamboo plate can be fixed on the steel pipe without slipping off.In order to ensure the stability, after the bamboo plate is laid, the cloth is used again. In addition, in order to prevent the bamboo board from wearing the shed film on both ends, a pair of worn socks or rubber holsters can be worn on both ends of the bamboo board.
It seems that Master Wang’s method is indeed very good. This not only increases the double insurance for the stability of the greenhouse frame, but also greatly prolongs the service life of the film. Interested farmers may also try it.
Medical protective masks refer to self-priming filter dustproof medical protective equipment that can filter particles in the air, prevent the spread of certain infectious microorganisms in the respiratory tract, and block droplets, blood, body fluids, secretions, etc.
Medical protective masks are masks made of one or more fabrics that have isolation effects on viral aerosols, virus-containing liquids, and so on. Under the respiratory airflow, it still has a barrier effect on viral aerosols, virus-containing liquids, etc., and when removed, the outer surface of the mask does not contact the human body, can filter particulates in the air, and block droplets, blood, body fluids, secretions, etc. . The use of medical masks includes adhesion testing, training, model selection, medical treatment and maintenance.
Composition and function: The Medical Protective Mask consists of a mask face and a tightening belt. The mask face is divided into three layers: inner, middle and outer. The inner layer is ordinary sanitary gauze or non-woven fabric. Propylene fiber melt-blown material layer, the outer layer is non-woven fabric or ultra-thin polypropylene melt-blown material layer. This high-efficiency medical Protective Mask is highly hydrophobic and breathable, and has a significant filtering effect on tiny virus-carrying aerosols or harmful fine dust, and the overall filtering effect is good.
The medical protective mask has a good fit with the wearer's face, can filter particles in the air, block pollutants such as droplets, blood, body fluids, secretions, etc., and can filter non-oily particles by more than 95% Personal protective equipment commonly used to deal with airborne diseases.
Product specifications: According to the national standard GB 19083-2003 "Technical Requirements for Medical Protective Masks", important performances of medical protective masks include filtration efficiency, adhesion, liquid barrier performance, comfort, hygiene, and biological safety tests.
Scope of application: Medical protective masks are better protective products. It is recommended to wear when there is serious environmental pollution or sudden medical infectious diseases (such as respiratory tract infectious diseases), to prevent the spread of viruses from patients or the environment to users.
Important indicators: including non-oily particle filtration efficiency and airflow resistance.
(1) Filtration efficiency: Under the condition of air flow (85 ± 2) L / min, the filtration efficiency of aerodynamic median diameter (0.24 ± 0.06) μm sodium chloride aerosol is not less than 95%.
(2) Tightness: The overall fit factor of the mask should not be less than 100.
How to use: How to wear a head mask
(1) Gently pinch the nose clip and place the mask on the face to ensure that it can cover the nose and mouth.
(2) The upper elastic band is fastened on the head to prevent air from entering.
(3) Tighten the lower elastic band around the neck.
(4) Be sure to fully open the mask to minimize the number of layers used during breathing.
How to wear earhook masks
(1) Pass the ear straps with both hands, place the nose clip on the upper part, and wear the mask on the nose and mouth
(2) The ear strap should be placed at the base of the ear and spread from head to toe, so that the folds of the mask are fully unfolded, which helps to cover the face to the greatest extent and minimize the number of layers required for breathing.
(3) Gently pinch the nose clip to prevent air from entering.
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