很少有商人走完整条路线；货物主要由一系列的中间商经营。
Few merchants travelled the entire route; goods were handled mostly by a series of middlemen.
公司主要经营音频和视频的全系列产品。
经营的主要产品有：包装材料、防静电系列、劳保用品、净化产品等。
Operated main products include: packaging materials, anti-static series, labor insurance supplies, purification products.
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