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1.The Rockwell hardness tester is used to measure the hardness of metals.
洛氏硬度试验器用于测量金属的硬度。
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2. The Rockwell hardness tester is a valuable tool for engineers in their work.
洛氏硬度试验器是工程师工作中的重要工具。
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3. The Rockwell hardness tester is widely used in industries such as metallurgy and machinery.
洛氏硬度试验器在冶金和机械行业中广泛应用。