According to the latest two planes network and IPTN technology, this thesis tracked analyze the new developing direction and trend of MPLS VPN.

并且根据当前最新的双平面组网技术和IPTN技术跟踪分析了MPLS VPN当前的最新发展趋势和动向。

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Meanwhile, forecast developing trend of China pipe market in first half year in 2006 and put forward the strive direction for the future.

同时，预测了2006年上半年中国钢管市场的发展趋势，提出了今后的努力方向。

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