collodion cotton

... collet 小轴钳；套筒 collodion cotton 胶棉，低氮硝化纤维素 colloid mill 胶体磨 ...

 pyroxylin

... pyroxenite = 辉岩 pyroxylin = 低氮硝化纤维素 pyrrhotite = 磁黄铁矿 ...