Since January 1990, the European Union has required that all toy products on the market within the Union must comply with the CE marking standard and indicate the CE marking on the toy packaging.

The development of bags has resulted in a wide variety of types today, among which we commonly see backpacks, briefcases, cosmetic bags, ice bags, schoolbags, wallets, belt bags, pen cases, CD bags, and so on. Our company specializes in making wallets, which include short wallets, long wallets, hinge wallets, zipper wallets, shredded silver bags, key bags, etc. The short wallets are further categorized into horizontal or upright single bags, mother-child bags, flip-top bags, and triple-fold bags. The main materials used in making wallets include various genuine leather, artificial leather, nylon, etc.

API is the abbreviated English name for the American Petroleum Institute, commonly referred to as API standards.

This standard specifies the inspection and pressure test requirements. This standard applies to the inspection and pressure test of metal sealing pairs, elastic sealing pairs, and non-metallic sealing pairs (such as ceramics) for valves, including their , , , and . After the agreement of both parties, it can also be applied to other types of valves.

During the test, a rubber bag should be placed over the buckle to prevent the buckle from bursting open; Two watch bands from each batch must be sampled and fixed on the test stand as shown in Figure 1;