Barter is the present and the future of international trade, especially for people who is starting in the import export business. Barter and more: Triangular operations.
Inner danger: is the gallbladder, which is the heart of basketball. In the innermost layer of basketball, it is made of black rubber
Wittering: The surface of the ball is evenly wrapped around a basketball special nylon wire, which forms a protective layer like cocoon on the ball, but not every basketball uses this process. Replace with gauze;
3. Mid -tire: The support structure between the inner and the epidermis is made of rubber. The structure shape of the basketball and the color of the gap are all realized here (ordinary tires, foaming in the middle of the tire, aggravated tire)
Epidermal: The most direct understanding of basketball, divided into three categories: rubber, synthetic skin (ultra -fine fiber, PU, ??PVC, etc.), leather
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