The ball material selection can be based the parameters of mill thereby working out the dimensions of mill.

当磨机参数一定时，可根据计算的冲击功选择磨球材料，从而确定磨球的尺寸。

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Experiments have been carried out to explore mechanical properties and co working characteristics of the multilayer steel glue composite material.

为探讨多层钢胶复合材料的力学性能及联合工作特征进行了大量试验。

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It points out that the advanced production craft and strict screen material is the fundamental premise for ensuring the quality of insulating material for live working.

指出了先进的生产工艺以及严格的原材料筛选是保证带电作业用绝缘材料质量的基本前提。

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To put the reports coming out of Japan in perspective, the NRC limits occupational radiation exposure for adults working with radioactive material to 50, 000 microsieverts a year.

WSJ: Radiation's Effect Depends on Amount