spherical crown

By reasonable hypothesis and deduction , the power ratio of straight light to reflect light from linear vehicle light source is approximately converted to the area ratio of the spherical crown in this article by the author .

通过合理的假设与推导，将汽车车灯线光源的直射光与反射光的总功率之比近似地转化为两部分球冠面积之比；

Grind Research of Spherical Crown with High Precision

高精度球冠的磨削研究

Introduce a try to grind precision spherical crown , including its principle and method , discuss the possible tolerance and give a formula to control the quality .

介绍了为磨削高精度球冠所做的尝试，阐述了所采用的磨削原理、技术方案，讨论了加工误差，推导了控制球面轮廓误差的公式。

In drilling cobble and gravel formation , diamond enhanced tungsten carbide composite spherical crown button bits without strengthened gage achieve an average drilling rate of2 .

介绍了金刚石&硬质合金复合球齿钻头在内蒙古某地区铀矿床卵砾石层中的生产试验情况。

Diamond enhanced tungsten carbide composite spherical crown button bits with strengthened gage achieve an average drilling rate of 2.82 m / h and an average service life of 10.18 m ;

保径加强型金刚石&硬质合金复合球齿钻头的平均钻进效率为2.82m/h，钻头的平均寿命为10.18m/个；

The epithelium of the-mucosa is simple columnar and the top of epithelium appears a spherical crown and its surface is scattered all over with microprotrusion .

结果，粘膜表面散布许多隆起的乳头，其上皮为单层柱状上皮，上皮细胞顶端呈球状冠，表面布满球形微突；