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YH-511B mechanical impurity tester
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YH-511A mechanical impurity tester (two channels)
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YH-11143A Liquid Phase Corrosion Tester
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YH-5096C metal bath copper sheet corrosion tester
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YH-5096B copper sheet corrosion tester
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YH-1884A oil product density tester
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YH-510G automatic freezing point and pour point tester
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YH-510F automatic freezing point and pour point tester
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YH-510A type petroleum product freezing point tester
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YH-6536E automatic distillation measuring instrument
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YH-6536C petroleum product distillation tester (low temperature single tube type)
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YH-6536B petroleum product distillation tester (low temperature double tube type)
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