How to keep constant temperature in production floor during winter time?
在冬季，车间里是如何做到温度的恒温的？
The cancellous bone porosity basically keep constant along the transversal direction.
松质骨孔隙率在垂直于轴向的方向基本不变。
The cancellous bone porosity basically keep constant along the transversal direction.
松质骨孔隙率在垂直于轴向的方向基本不变。
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