A plastic membrane serves as selective diffusion barrier.
一层塑料薄膜起着选择性渗透屏障的作用。
The invention discloses a cutting method of plastic membrane roll, belonging to a cutting method of plastic membrane.
本发明公开了一种卷绕后的塑料薄膜卷的分切方法。
But DNA from hair is very clean because it has been encapsulated in keratin, a kind of plastic membrane that protects the hair and the DNA.
但从头发提取的DNA就非常干净,因为它有角蛋白包裹,角蛋白是一种塑胶薄膜可以保护头发和DNA。
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