spherical crown

基本解释

Crown is spherical, and in the air to draw a beautiful curve.
树冠是球形的，在空中画出优美的曲线。
Test results show diamond enhanced tungsten carbide composite spherical crown button bits are the ideal bits in drilling cobble and gravel formation.
试验表明金刚石—硬质合金复合球齿钻头是一种理想的钻进卵砾石层的钻头。
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。