(1) Pesticides used in the suppression of vegetables: highly toxic pesticides: such as phosphorus amine, methamidophos, monocrotophos, carbofuran, 3911, 1059, 1605, methyl 1605, Suhua 202, chlorpyrifos, isopropofol , trithiaphos, zinc phosphide, aluminum phosphide, cyanide, fluoroacetamide, arsenic, chloropicrin, pentachlorophenol, dibromochloropropane, 401, etc. These pesticides are highly toxic to humans and animals and can cause acute poisoning by entering the body through the human mouth, skin and respiratory tract. Highly toxic, long-lasting residual pesticides that can cause accumulation of poisoning: such as mercury preparations, Sai Li San, Xi Li Sheng and so on. These pesticides have a long residual period and have a half-life of 10-30 years in the soil, which can cause accumulation of poisoning in the nervous system of humans and animals. Low-toxic, long-lasting pesticides that can cause accumulation of poisoning: such as hexachlorocyclohexane, DDT and chlordane, poisonous sulphate, dieldrin, etc., which have been banned in the central government. These pesticides are chemically consolidated, are not easily decomposed by the influence of sunlight and microorganisms, and have low volatility. They dissipate 95% of their ability in soil for 10 years. They are fat-soluble drugs that can accumulate in plants and human and animal fat. Insecticides can cause chronic poisoning in humans and animals, and are banned on vegetables.
(2) Pesticides permitted for use on vegetables: biological pesticides. These pesticides are non-toxic to humans and animals, and have no pollution to the environment. They are non-polluting pesticides, such as insecticides, poisonous bacteria, 7216 bacteria, Bacillus thuringiensis, and DT. High-efficiency, low-toxic, low-residue insecticides such as dichlorvos, trichlorfon, enemy killings, insecticidal bismuth, phoxim, marathon, pyrethroids, pyrethroids, dicofol, carbaryl, and Le Fruit, omethoate, acephate, chlorpyrifos, fenthion, isopropyl phosphate, diazinon, azine, and permethrin. High-efficiency, low-toxic, low-residue fungicides such as cytotoxic, carbendazim, chlorothalonil, ethylphosphorus, thiophanate, methyl thiophanate, sterilized dan, zinc, dexame ring, and daisen Manganese, dexamethasone, stone sulphur mixture, Bordeaux mixture, copper soap solution, thiram, arsenic arsenic, copper sulphate, downy mildew, potassium permanganate, formaldehyde, sulfur powder, manganese zinc, powder rust, agricultural anti-120, 83 Add agents and so on. Herbicides: such as trifluralin, herbicide ether, herbicide No. 1, chlorpyrifos, and cable.
Self drilling Screw made of 410 stainless steel, high hardness (40 Rockwell C), steel process.
Drilling screw is also very strong hardness, compared to the ordinary screw up, not only to maintain the ability is good, the connection object effect is also very strong, for the performance of the screw, are generally does not need auxiliary processing, can be directly on the object directly drill a Kong Sue into objects, not just use rise very convenient, Also can greatly improve the efficiency of work. This kind of drilling screw can be said to be the first choice of workers in various fields.
So what is the use of drilling screws?
1 stainless steel plate, metal plate, galvanized steel plate, engineering installation.
2 metal curtain wall metal light compartment and other indoor and outdoor installation.
General Angle steel, channel steel, iron plate and other metal materials combined installation.
4, automobile, container, shipbuilding, refrigeration equipment and other assembly projects.
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