... 球几何学：geometry of spheres 球极平面射影：stereographic projection 球冠：spherical crown ...
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spherical crown button 球齿
spherical crown button bits 球齿钻头
base of a spherical crown 球冠的底面
area of a spherical crown 球冠的面积
height of a spherical crown 球冠的高
composite spherical crown button bits 复合球齿钻头
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spherical cap
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。
youdao
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。
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