Look at the processing plant: see if it has a specific production and manufacturing industrial plant, sound production and manufacturing equipment, technical professional technical elite team and its strict testing machinery and equipment. This is very important, good is their own door-to-door service visits, to prevent some shell companies from being blinded, suffered losses.

2. Look at the qualification certificate: see whether it has up to standard production and manufacturing qualification certificate, enterprise business license and ISO enterprise qualification certificate, etc. this kind of stainless steel rivet is the reasonable evidence to prove the overall strength of the enterprise.

3. Looking at the commodities, we must point out the technical and professional methods here. We will show you some application methods for reference only

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麻花豆星空天美糖心mv-星麻花传媒mv-星空天美梦幻mv免费-天美麻花星空果冻mv-62星空天美梦幻糖心mv-天美电影免费在线观看A. Does the top of your head shine

麻花豆星空天美糖心mv-星麻花传媒mv-星空天美梦幻mv免费-天美麻花星空果冻mv-62星空天美梦幻糖心mv-天美电影免费在线观看B. Are there cracks, cracks, scratches on the top of your head

C. Head is round mouth, umbrella head, small flat head, or frosted.

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F. Is the rivet bar in the middle of the top of the head, otherwise it will bend and bend

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麻花豆星空天美糖心mv-星麻花传媒mv-星空天美梦幻mv免费-天美麻花星空果冻mv-62星空天美梦幻糖心mv-天美电影免费在线观看② Whether the specifications of each position are in line with the production and manufacturing regulations. The important index values such as the diameter from the beginning, the diameter of the rod, the length of the rod to the depth of the triple lock rivet must be measured to more than two or three times, and 10-20 pieces of samples should be inspected each time. In the case of accurate measurement, we must adopt the standard size, standard precise measurement attitude, so as to ensure the effectiveness of accurate measurement.