The general situation of market and development trend of PVC resin at home and abroad were introduced.

介绍了世界及我国PVC树脂的市场概况及发展趋势。

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First part is the current situation, characteristic and development trend of the present technology trade market.

第一部分为当前技术交易市场的现状、特点与发展趋势。

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Master business management and marketing sales knowledge, know about trend of market need, status and development trend of bus and coach technology.

经营管理知识，市场营销知识，了解市场需求趋势，产品技术现状和发展趋势。

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