应用于脂肪酸甲脂、碳水化合物、中性固醇等内径mm长度m膜厚um价 格 内径mm长度m膜厚um价 格0.20300.31600 0.32300.316000.20300.616000.32300.616000.20500.324000.32301.017000.20500.624000.32500.324000.25150.39000.32500.624000.25150.69000.32501.026000.25300.316000.32503.038000.25300.616000.53150.512000.25301.017000.53151.013000.25500.324000.53300.522000.25500.624000.53301.023500.25501.026000.53500.533000.32150.39000.53501.035000.32150.69000.53503.05000