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QINGDAO HONGDU TONGHUA ENERGY CO., LTD.
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supply Coal tar

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QINGDAO HONGDU TONGHUA ENERGY CO., LTD.

supply Coal tar

supply Coal tar

Specifications Liquid Coal Tar 1.Sulfur content:0.5 % 2.Quinoline insoluble content:4.5 to 5.% 3.biggest Manufacture 4.free sample high temperature black viscous liquid Crude coal tar 1.Sulfur content...

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