Children's furniture can be purchased in a free way: according to the study room, bedroom space, environmental atmosphere and functional use requirements, flexible arrangements can be combined into an ideal personality space. In terms of color, most of them are lively, bright, natural and can be interchanged with styles, giving children more freedom to choose and cultivate their aesthetic taste. Smell Most of the wooden furniture sold on the market, except for all solid wood furniture, has wood-based panel parts. Therefore, you should especially smell when you buy. If you make people cry and sneeze, it means that the formaldehyde emission of the furniture is relatively high, there may be problems, do not buy. Look at the report Consumers request a quality inspection report from the dealer to see if the amount of formaldehyde released from the furniture is within the limits allowed by the standard. The national standard "Limits of Hazardous Substances in Wood Furniture for Interior Decoration Materials" stipulates that the amount of formaldehyde released in wooden furniture should not exceed 1.5 mg per liter. If the purchased wood furniture exceeds the standard, do not buy it. It is recommended to buy furniture that meets the e1 standard plate. Only plates that meet the e1 standard can be truly harmless to the human body. Ask the price Most of the wood furniture with excessive formaldehyde is made of cheap artificial boards, so the price of the whole set of wooden furniture is often "ultra-low". Due to the intensive use of inferior glue in cheap man-made boards, the amount of formaldehyde released is seriously exceeded. Signing a contract When customers purchase furniture, it is best to sign the "Furniture Sale Contract" and write the environmental protection clause into the contract. Invoice Nowadays, a large number of consumers are tempted by low-cost dealers, taking white bars, receipts, etc., and when they go out of complaints about quality problems, such informal invoices are often difficult to use as valid evidence, so they buy The furniture must be issued by the dealer with a formal invoice. What kind of furniture should I choose for all ages? Infancy Furniture features: comfortable, safe and healthy Functional requirements: have a comfortable sleep and activity space 3 years old - 5 years old Furniture features: cheerful colors and fun Functional requirements: emphasis on storage function 6 years old - 7 years old Furniture features: full-featured, rational use of space Functional requirements: both entertainment and learning functions, ready for school 8 years old - 10 years old Furniture features: reading function, emphasis on safety Functional requirements: each function combines and cultivates various hobbies 10 years old - 12 years old Furniture features: increase comfort, emphasize learning function Functional requirements: Reasonable planning of storage space, helping children to take care of themselves
A gear or cogwheel (Gear Wheel) is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source. Gears almost always produce a change in torque, creating a mechanical advantage, through their gear ratio, and thus may be considered a simple machine. The teeth on the two meshing gears all have the same shape. Two or more meshing gears, working in a sequence, are called a gear train or a transmission. A gear can mesh with a linear toothed part, called a rack, producing translation instead of rotation.
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Children's furniture purchase tips, different ages have different needs
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