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关注：1
2013-05-23 12:21
求翻译：由硫化进行历史中可知，促进剂是硫化体系是必不可少的物质！！！是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
由硫化进行历史中可知，促进剂是硫化体系是必不可少的物质！！！
问题补充： |
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2013-05-23 12:21:38
By the curing of history we can see, vulcanization accelerator is a material system is essential! ! !
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2013-05-23 12:23:18
It can be seen from history, to promote a vulcanized agents are the sulphide system is indispensable material! ! !
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2013-05-23 12:24:58
Carries on in the history by the curing to be possible to know, the promoter is the curing system is the essential material!!!
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2013-05-23 12:26:38
By vulcanization in the history, promoters are curing system is an essential substance!!!
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2013-05-23 12:28:18
By vulcanization in the history, promoters are curing system is an essential substance!!!
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