The experimental result that the best membrane is polyethylene which the thickness is better than another and has bleeder vent.

实验结果表明，厚度最高且带有一定透气孔的聚乙烯薄膜最好。

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The experimental result that the best membrane is polyethylene which the thickness is better than another and has bleeder vent.

实验结果表明，厚度最高且带有一定透气孔的聚乙烯薄膜最好。

youdao