以下为句子列表：
英文: The destruction resistant properties of several standard test ore pieces and natural ore blocks of various sizes were measured.The results show that the compression strength of natural ore is far less than that of standard test pieces and has the tendency
中文: 测定了多种矿石标准试件及不同粒度自然矿块的抗破坏性能，表明自然矿块的抗压强度远小于标准试件，且具有随粒度减小而增大的趋势，也说明金属矿粗磨机球径计算中采用标准试件抗压强度代表岩矿破坏性能是不合理的。
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