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I've seen two recent stories about cup design. The first story is about a couple, the boy likes porcelain, he came to Jingdezhen. His wife
2019年5月7日
Focus on high-quality water bottle for 15 years
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Focus on high-quality water bottle for 15 years
I've seen two recent stories about cup design. The first story is about a couple, the boy likes porcelain, he came to Jingdezhen. His wife
1. What is the working principle of the insulated water bottle? Its wall is composed of two layers, and the middle of the two layers
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