2019-6-11
四氯化碳为无色澄清易流动的液体, 工业上有时因含杂质呈微黄色, 具有芳香气味, 易挥发. 密度(20℃)1.595克/立方厘米、熔点－22.8℃, 沸点76～77℃. ...
carbon tetrachloride
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2019-5-28
I take charge of the respective factory main production black static electricity bag black electric...
Black conductive coating
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