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.
Material classification of tennis rackets
Disadvantages of glass fiber tennis rackets: low mechanical properties; low strength; average damping performance. Advantages: The damping performance is better than that of metal rackets. The price is moderate, 400–1200 RMB.
Disadvantages of carbon tennis rackets: low mechanical properties, low strength; miscellaneous materials used. Advantages: The damping performance is better than that of metal rackets. Low and mid-range. The price is 400-1200 RMB.
Full carbon fiber tennis racket, disadvantages: expensive; complex molding process, manual layup, low productivity; high product defect rate. Advantages: fast hitting response, excellent mechanical properties; best damping performance, best hitting feel. The price is generally 1700-3000 RMB.
Disadvantages of wooden tennis rackets: poor mechanical properties; slow response to hitting the ball. Advantages: Damping performance is better than metal beats.
Disadvantages of aluminum alloy tennis rackets: low grade; poor damping performance, easy wrist injury. Advantages: simple production process, suitable for industrial production; low production cost and low price.
Disadvantages of carbon-aluminum tennis rackets: poor performance; poor damping; low grade. Advantages: The price is 200-300 RMB cheaper.
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