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易之家是基于全球贸易数据、垂直贸易人脉的sns精准营销平台。提供全球海关数据、进出口数据、外贸数据的查询，包含各国供应商、采购商公司名单和产品贸易数据库。

vvchem offers free directory and database of chemicals and chemical manufacturers from china and all over the world. vvchem is the perfect platform for suppliers seeking enduser purchasers of chemicals.