Lens are made of opticalglass and should be cleaned with cloth made of special materials.
镜头都是由光学玻璃制成的，要用特殊材质的镜布来擦。
2
Diamond grinding wheels are widely used as grinding tools in manufacturing of hard and brittle materials, such as hard alloy, engineering ceramics, opticalglass, semiconductor materials, and granite.
金刚石砂轮广泛用作硬质合金、工程陶瓷、光学玻璃、半导体材料、花岗岩等硬脆难加工材料的磨削工具。
3
The optical microscope and SEM were employed to analyze the damage of glass fiber during weaving and resin permeability in the course of molding of composite materials.