12.5x64x0.025简算

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12.5x64x0.025简算12.5x64x0.025简算12.5x64x0.025简算12.5x64x0.025=12.5*8*8*0.025=20

12.5x64x0.025简算
12.5x64x0.025简算

12.5x64x0.025简算
12.5x64x0.025
=12.5*8*8*0.025
=20