... 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 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。
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