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3??????????????????????????????0.4-1cm??????????????????????????????????k???????????????????????????????1cm????
? http://www.jiakesu.com/news/2011614154654.htm
http://www.jiakesu.com/
1??????????????21??????????????????????????????????????????????
2???6050?????????????????????????????????????
3??????????????????????????????0.4-1cm??????????????????????????????????k???????????????????????????????1cm????
? http://www.jiakesu.com/news/2011614154654.htm
http://www.jiakesu.com/
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