The salesman showed some samples of dress material.
店员展示一些布料样品。
Investigation on Fast Reconstructing Reflection Coefficient from Big Acoustic Material Samples by NAH
声学材料大样声反射系数声全息快速反演方法研究
Assist engineer on packaging material sample work. Make samples with supplier, get confirmation from Towson, etc.
协助工程师完成包装材料的打样，确认。
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