petrochemical free是什么意思

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推荐答案 2016-04-04

petrochemical free
ç³åèªç±

petrochemical
è±[ˌpetrəʊˈkemɪkl]
ç¾[ˌpetroʊˈkemɪkl]
n. ç³æ²¹åå¦äº§å;
adj. ç³æ²¹åå¦ç; å²©ç³åå¦ç;
[ç½ç»] ç³æ²¹åå·¥; ç³å; ç³æ²¹åå·¥äº§å;
[ä¾å¥]This paper described generation, characteristics and collection methods of petrochemical enterprises emergency wastewater.
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[å¶ä»] å¤æ°ï¼petrochemicals å½¢è¿è¯ï¼ macrochemical hydrochemical neurochemical

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free是什么意思英语 petrochemical petrochemical中文 FREE