Test the purifier noise laboratory Do you know how to do it?

Test the purifier noise laboratory Do you know how to do it?

The ring instrument instrument Xiao Bian to explain to everyone to explain the test of the noise test of the purifier, first to give you a simple analogy, our fans, is not there is a 1st, 2nd, 3rd, 4th gear, is not a small file When the sound is relatively small, the sound is louder at large, but it is not cool enough to turn it down. The principle of the purifier is similar to that of the fan, where the air is sucked in and the clean air is blown out on the other side. When the large gear, the wind power is large, and the noise is also great. If the purifier can achieve a small noise and high power, it is a purifier. What happened to the manufacturer.

Here the ring instrument needs to explain the noise room, place the purifier in the noise room, open to the maximum gear. Look at how much noise the DB is in.

Welcome to ring instrument.

Insecticide Single Formulation

Insecticides can be divided into biological sources and chemical synthesis.
Biogenic insecticides include: â‘  preparations of effective insecticidal ingredients extracted from higher plants, such as natural pyrethrin, rotenone, etc.;
â‘¡ Insecticides made from living organisms mainly include fungi (such as Beauveria bassiana), bacteria (such as odontobacillus) and viruses (such as Bacillus borer).
â‘¢ Insect physiological active substances, such as pheromones.
Chemical synthetic pesticides mainly include: Inorganic insecticides (e.g. White arsenic As2O3, Sodium fluosilicate, Na2SiF6, etc.), organochlorine insecticides (such as chlordane, BHC, DDT, toxaphene, etc.), organophosphorus insecticides (such as dichlorvos, trichlorfon, Dimethoate, malathion, chloraphenone, etc.), carbamate insecticides (such as carbaryl, sulfenocarb, etc.) and pyrethroid insecticides (such as fenvalerate, cypermethrin, etc.).
The main ways in which insecticides can kill pests are:
â‘  Touching agents enter the body through the epidermis of the pest and play a role, causing the pest poisoning and death;
â‘¡ Gastric toxic agents are absorbed by the stomach and intestines directly after being eaten by pests, causing them to die of poisoning;
â‘¢ Some fumigation drugs are volatile, and their vapors enter the body through the respiratory tract of pests, causing them to die of poisoning;
(4) ingestion drugs are first absorbed by the crop, and conducted to the whole plant, when pests ingestion, eating crops, so that it died of poisoning.

Insecticide Single Formulation,Vegetable Root Knot Nematode,Aphids Leafhoppers Planthoppers,Contact Stomach Poisoning Fumigation

Anhui Meiland Agricultural Development Co., Ltd , https://www.meilandagro.com

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