Under certain wear condition the wear resistance of 45 steel with medium hardness is higher than that with high hardness.
在一定磨损条件下，中硬度钢比高硬度钢耐磨。
The compressibility of vuggy rocks with medium hardness is usually small and can be neglected in the calculations of reservoir engineering.
计算结果还表明，中等硬度的岩石溶洞的压缩系数都很小，油藏工程计算中可将其忽略。
Ring hammer crusher apply in mining, cement, coal, metallurgy, building materials, road, such departments of medium hardness and brittleness material finely.
环锤式破碎机适用于矿山、水泥、煤炭、冶金、建材、公路、燃化等部门对中等硬度及脆性物料进行细碎。
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