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1/1000 2/1000 1/1000~2/1000 1/1000~3/1000
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为跨度的0.5/1000 为跨度的1/1000 为跨度的2/1000 为跨度的3/1000
1/100~3/100 1/1000~3/1000 1/10000~3/10000
1/100~3/100 1/500~3/800 1/1000~3/1000 1/1000~5/1000
1/1000 3/1000 1/1000~3/1000 L/1000
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1/1000~3/1000 1/100-3/100 3/1000-5/1000
1/1000~3/1000 1/100~3/100 3/1000~4/1000 3/1000~5/1000
1/1000~3/1000 1/1000~5/1000 2/1000~5/1000 3/1000~8/1000