Double Handles Bathroom Faucet 1. Copper body: As far as the faucet is concerned, copper has long become the preferred material, mainly because the antibacterial effect of copper media has long been recognized by authoritative laboratories. Most high-end bathroom brands use copper as the body of the faucet, and the elimination of other materials has become an inevitable trend. Rain Shower Faucet,Single Handle Bathroom Faucet,Single Handle Bathroom Mixer,Single Handle Rain Shower WENZHOU CHENKAI SANITARY WARE CO.,LTD , https://www.cnchenkai.com
Minimize the use of pesticides. The selection of pest-resistant varieties is the most economical, safe and effective method for controlling pests and diseases. Secondly, in the summer or in the winter, the cultivated land can be used to kill some germs and eggs, and cooperate with the application of fully decomposed organic fertilizer. After strengthening the field management and creating environmental conditions suitable for crop growth and not conducive to the occurrence of pests and diseases, it can effectively reduce the occurrence of pests.
Specify the scope of use of pesticides. According to the chemical nature and toxicity of pesticides, it is forbidden to use pesticides with high toxicity, high toxicity, large accumulation and long residual period on some crops. Such as chlordane, dicofol, etc., although not highly toxic pesticides, but have cumulative poisoning effects, should be prohibited on vegetables, tea, tobacco, medicinal herbs and other crops; and such as parathion (1605), methyl parathion, Phosphate (1059), carbofuran, aldicarb, methamidophos, monocrotophos, etc. should never be used on vegetables. Among them, alfalfa, phorate and carbofuran can only be used for seed treatment or soil treatment of cottonseed, wheat, corn, sugar beet, etc. Other crops should not be sprayed. Parathion is used to control fruit tree pests and must be used 30 days before fruit harvest.
Strictly control the application concentration, application amount, dosage form, frequency and application method of pesticides. In the agricultural dosage form, the amount of the emulsion oil is large, the milk powder and the wettable powder are the second, and the water agent is lower. From the application method, seed treatment, soil treatment, and tree dressing have higher residues than spraying and dusting. Special attention should be paid to the application of pesticides close to the harvest period of crops. It is necessary to select the variety of drugs with low toxicity and rapid decomposition, strictly control the dosage, concentration, application method, frequency of application and time of disabling.
Strictly follow the last application time before harvest. According to the safety interval of various pesticides, and according to the principle of early treatment, the pesticides can be greatly reduced in the growth period of crops and in the early stages of pests and the initial infection of the bacteria. For example, the safe interval of A 1605 on crops such as grain and fruit is 20 days, and the early application according to the regulations can make the residual amount of methyl 1605 not exceed 0.2 ppm in the harvested fruit.
2. Electroplating: The quality of the electroplating surface is the most intuitive expression of the quality of the faucet. The surface plating is mainly nickel and chromium, so that it achieves a smooth and bright effect. Good quality faucets will undergo many tests, such as salt spray test, water test test, gas test test, etc., to ensure the durability of the faucet. After high-precision plating faucet, durability is basic, and more importantly, its surface gloss is good and comfortable to handle. Some high-grade faucets have other different treatment techniques, such as stainless steel and satin.
3. Filter screen: In areas where the water quality is not superior, the installation of the filter screen can reduce and filter impurities, and at the same time prevent the possible damage caused by impurities to the ceramic valve core. There are two installation locations for the filter: the water inlet and the spout.
4. Rotation angle: can rotate 180 degrees to make the work convenient, and can rotate 360 degrees is only meaningful for a sink placed in the center of the house.
5. Can lengthen the shower head: increase the effective radius, increase more functional possibilities, and the sink and container can be filled faster. In order not to make unpleasant noises, metal pipes should be avoided as much as possible.
6. Water pipe length: Experience shows that 50 cm long pipes are enough, and pipes of 70 cm or more can also be bought on the market.
7. Anti-calcification system: calcium will be deposited in both the shower head and the automatic cleaning system, and the same situation will occur on the faucet, where silicon will accumulate. The integrated air cleaner has an anti-calcification system that prevents calcification of the device internally.
8. Anti-backflow system: This system prevents dirty water from being sucked into the clean water pipe, which is composed of layers of materials. Devices equipped with an anti-backflow system will display the DVGM pass mark on the surface of the package.
9. Material: Stainless steel is hygienic and environmentally friendly. Chromium devices are easy to care for and harmless to people, but other elements need to be added to the manufacturing process. Therefore, it must be paid attention to what materials the equipment is made of, and not all countries have such high standards as Germany.
10. Durability: The anti-calcification system can protect the equipment from the danger of water leakage and handle damage.
After applying pesticides to various crops, some residual or excess residues may be present on the surface, fruits and grains of the crops in a certain period of time, and some may penetrate into the waxy layer or the inside of the epidermis. Go, some of the systemic drugs can be absorbed by the crops to other parts, so that in the harvested agricultural products, trace amounts of excess pesticides or toxic metabolites are inevitably left over, and over time, it may harm humans and animals. health.
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