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1???????????:????????20?(16????????,16????????);???:????????40?(16????????,16????????)?

2??????1.6?;????:???,??????????????????????????????,????,???,??????,????,??????????;???????????(??)??, 

3???????????????,?????????,????????,??????????550mm,?????,????;?????,????;

4????????????(??????0.8—1.5??????????);????:??????????????????

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