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[国外标准] EN ISO 3146-2000 Plastics - Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods

P:2019-09-28 21:29:52

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speech channel - 电话通路,声道,电视声道 (0) 投诉

P:2019-09-30 14:53:57

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telephony - 电话学,电话 (0) 投诉

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