分级滤膜,团粒分级滤膜,分级火棉胶膜的英文

gradocal membranes

graduated collodion membrane

• 分级:    grade; classify; c ...
• 滤:    filter; strain
• 膜:    membrane
• 火棉:    guncotton; pyroxyl ...
• 胶膜:    coating