1. A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set. 一种防治近视眼的理疗器，它有作为物镜的凸透镜、镜筒、目镜，还有头套和透镜组，它用于人们在近距离上长时间用眼时戴在眼上，可以使被视物的像清楚、放大和变远。
2. Main product:F600 lens for large size engineering duplicate, F300 lens for writing projector, lens for engrave machine, CCD lens and various protecting goggles from laser radiation. 主要产品：F600大型工程复印镜头、F300书写投影镜头、雕刻机镜头、CCD镜头、各种激光防护眼镜。
3. Main product:F600 lens for large size engineering duplicate, F300 lens for writing projector, lens for engrave machine, CCD lens and various protecting goggles from laser radiation. 主要产品：F600大型工程复印镜头、F300书写投影镜头、雕刻机镜头、CCD镜头、各种激光防护眼镜。
4. Cylindrical lens method: cylindrical lens can be seen as being a lot of convex lens piece-by-side components of lens plate that has divided like. 柱面透镜法：柱面透镜可以看不败由许众凹透镜片并排构不败的透镜不活，它具有不不不合像功用。
5. To prevent an object from being printed on a sheet, select the object, click Object on the Format menu, click the Properties tab, and then clear the Print Object check box. 如果不想将某个对象打印到报告上，选定该对象后，再选择“格式”菜单中的“对象”命令，在“属性”选项卡内清除“打印对象”复选框。
