..............page:1-5,22
..............page:23-28,50
Development of Diffraction Grating Manufacture
li yanqing; hao defu( changchun university of science and technology; changchun 130022. china; changchun institute of optics; mechanics and physics; chinese academy of sciences; changchun 130022. china)
..............page:66-68
..............page:51-52,65
The Research of Langmuir Probe Power Supply
tan yongsheng; wang jingfeng; liu zhihua( dalian songliao electronics co. ltd; dalian; chinai dep. center for sci. and tech; changchun university of science and technology; changchun 130022. china)
..............page:63-65