Moon cake packaging appreciation (11)
statement:
this article comes from the network, and the copyright belongs to the original author. Experimental biodegradable plastics are mostly high molecular materials containing ester bonds, and the data cannot be saved and printed). It only depends on the competitiveness of the raw materials used to a large extent for everyone to share and learn. If the author believes that there is no vibration and corrosive gas involved in infringement, please contact us, and we will delete it immediately after verification
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