二次曲面

generator neutral point

发电机中性点

generator motor 发电电动机 | generator neutral point 发电机中性点 | generator of a quadric 二次曲面的母线

osculating plane

密切平面

osculating parabola 密切抛物线 | osculating plane 密切平面 | osculating quadric 密切二次曲面

osculating sphere

密切球面

osculating quadric 密切二次曲面 | osculating sphere 密切球面 | osculation 密切

axis of a pencil of planes

平面束的轴

柱轴 axis of a cylinder | 平面束的轴 axis of a pencil of planes | 二次曲面的轴 axis of a quadric

surface, photosensitive

光敏(感表)面

光电表面 surface, photoelectric | 光敏(感表)面 surface, photosensitive | 二次曲面 surface, quadric

proper point of inflection

固有变曲点

proper point 固有点 | proper point of inflection 固有变曲点 | proper quadric 真二次曲面

principal axis transformation

主轴变换

椭圆(二次曲面)主轴 principal axis of ellipse (quadric) | 主轴变换 principal axis transformation | 主页;主枝 principal branch

projective property

射影性质

projective principal normal 射影吱线 | projective property 射影性质 | projective quadric 射影二次曲面

projective relation

射影关系

projective quadric 射影二次曲面 | projective relation 射影关系 | projective representation 射影表示

hyperbolic projectivity

双曲性直射

双曲点 hyperbolic point | 双曲性直射 hyperbolic projectivity | 双曲型二次曲面 hyperbolic quadratic surface

Hilt's law：希尔特煤品级定律

"hillside quarry","山坡石矿" | "Hilt's law","希尔特煤品级定律" | "hindered settling","阻流沈降"

Shaanxi Sunland Automatic Control Co.,Ltd：陕西神洲自动控制有限公司

SHAANXI QINCHUAN MACHINERY DEVELOPMENT CO.,LTD 陕西秦川机械发展股份有限公司 | Shaanxi Sunland Automatic Control Co.,Ltd 陕西神洲自动控制有限公司 | Shan Dong Shuang Yi Group Co.,Ltd 山东双一集团有限公...