对各种便携式硬度计进行了分类，对它们的各自的特点和性能以及影响试验结果的因素进行了详细的对比分析。
This article has class the portable hardness testers, and has analyzed their special performances and the influence factors for the results in detail.
对各种便携式硬度计进行了分类，对它们的各自的特点和性能以及影响试验结果的因素进行了详细的对比分析。
This article has class the portable hardness testers, and has analyzed their special performances and the influence factors for the results in detail.
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