NBN T 04-149-1983 7500 But-2-ene-1 4-diol for industrial use - Determination of iodine value《工业用丁二醇 1 4 碘值的测定》.pdf

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NBN T 04-150-1983 0000 Butane-1 4-diol for industrial use - Determination of degree of un-saturation《工业用丁二醇 1 4 不饱和度的测定》.pdf

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