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san mian tou ying yi
Author(s): 
Pages: 30-32
Year: Issue:  1
Journal: Applied Laser

Keyword:  投影仪激光热加工工件质量控制仪器投影屏幕打字机相对孔径投影系统反射镜;
Abstract: The operating principle,technical parameters,optical characteristics and imaging qua-lity of the three planar projector which is used for English typewriter keyboard's quality control atedescribed in this paper.(?)he instrument may be used for machanical manufacture and laser heat treat-ment to control the quality of dies and workpieces.
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