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Chapter IV Supervision ContentsEpisode 35Attack features include:Polylactic acid (PLA) is a new bio-based and renewable biodegradable material, which is made of starch raw materials proposed by renewable plant resources (such as corn). Starch raw materials are saccharified to obtain glucose, then glucose and certain strains are fermented to produce high purity lactic acid, and polylactic acid with certain molecular weight is synthesized by chemical synthesis method. It has good biodegradability, can be completely degraded by microorganisms in nature under specific conditions after use, and finally generates carbon dioxide and water without polluting the environment, which is very beneficial to environmental protection and is recognized as an environment-friendly material. This thing is actually a long piece, and then "curled up" in it and wrapped in a cylinder shape. What's the use? You will see it in a short time.项羽微微一愕，上下打量道：你是魏豹的人？罗七回答道是：是的。站在帐篷门口，黎水暗自发誓：下次洗澡怎么也要留半桶水，坚决不能再让魏铁这小子就着自己的剩水洗，太让人不堪了。