Non-tapping screws are machine Screw, the pieceworker to be fastened must be tapped with taps in the screw hole in advance to match the screw threads.
The difference between tooth screws and other screws depends on whether they can be used together with nuts. Tooth screws can be used with nuts. And relative to the screws of other teeth, there are self-tapping screws. The nut of this kind of screw has no bow teeth. As for the standard teeth and fine teeth are only different pitch, it is the nut of the machine screw
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The second and third certificates are all. Domestic pesticides must have the pesticide registration certificate number issued by the Ministry of Agriculture Pesticide Inspection, the designated production certificate number issued by the Ministry of Chemical Industry, and the certificate number issued by the enterprise quality inspection department. Imported pesticides only have pesticide registration certificates.
Third, the pesticide category. Under the various pesticide labels, there should be a non-fading mark parallel to the bottom edge to indicate different pesticides. Such as fungicide - black, insecticide - red, herbicide - green, rodenticide - blue, plant growth regulator - dark yellow.
Fourth, the net weight is expressed. Usually expressed in kg (kg), L (liter), g (gram), mL (ml).
5. Toxicity and flammability. The toxicity of the product and the flammability mark are clearly indicated in red on the pesticide label.
Six, instructions for use. Such as the scope of application and the object of prevention, the period of application, the amount and method of use, and the scope of use.
7. Effective period. Generally it is two years, starting from the date of production, so it must be marked with the date of manufacture and the batch number.
Eight, matters needing attention. Indicate the poisoning symptoms and first aid measures, safety intervals and special requirements for storage and transportation.
9. Production units. Have a manufacturing company name, address, telephone, fax, postal code.
When you identify the pesticide label, it will definitely improve the ability to identify the authenticity of the pesticide. If there are two or even one item in the above items, you should ask the dealer or seriously consider it. If the three certificates are incomplete, the pesticides that have not indicated the date of manufacture or have expired cannot be purchased. In the quality of the pesticide, the emulsifiable concentrate has been turbid, precipitated, and the powder preparation has been moistened and agglomerated, and cannot be purchased.
Identification method of pesticide label
First, the product name. Regardless of domestic or imported pesticides, the product name must have the Chinese common name and content and dosage form of the active ingredient in addition to the approved Chinese product name.
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