The correlations between the morphological characters and hetero-zygosity of R.philippinarum from Shanghai, Qingdao, Yantai, Xing-cheng, Dalian and Dandong were studied.
In the engineering survey in current electric power, several kinds of coordinate system and elevation in common use and their mutual matrixing relation are introduced.
This paper is described to draw tungsten wire with ZTA precision ceramic wortle at a high temperature, The profiles of tungsten wire and mould hole and the relation between them are researched.