In fact, when purchasing any product, it is important to pay attention to the main core components, as any component may lead to a decline in product quality. Therefore, it is still necessary to understand the basic knowledgeCold and hot shock testing machineThe main components are: 1 Compressor, 2 evaporator 3. Condenser, 4 Controller, 5 Inner and outer boxes made of stainless steel, 6 Wind turbine, 7. Insulation material, 8 sealing performance

All of these areCold and hot shock testing machineThe main components, any counterfeit parts will affect the quality of the product, so it is important to be careful and cautious when purchasing. Whether all components are *, and secondly, when choosing, it is necessary to have the supplier's business license, whether it belongs to production and sales, wholesale and sales,

Secondly, it depends on whether the registered address and factory address are the same

When visiting the factory on site, it is necessary to understand whether there are logos, posters, employee uniforms, etc. on site,

Fourthly, it depends on the on-site production process, especially the freezing and welding parts,

Number five, we need to check if there are any semi-finished products, finished products, warehouses, debugging areas, etc. on site,

Number six requires checking the company's establishment year and background,

Has Qiqi ever collaborated with some large listed companies and provided real-time feedback, multiple procurement records, customer on-site evaluation reports, etc,

What are the relevant certificates on site, especially for self-developed productsCertificates, etc