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1. The transmission density meter is used to measure the density of materials.
传输密度计用于测量材料的密度。
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2. The transmission density meter was used to detect the presence of a substance in a sample.
传输密度计被用来检测样本中物质的存在。
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3. The transmission density meter is an essential tool for measuring the density of materials.
传输密度计是测量材料密度的必备工具。