镶碳化钨硬合金齿钻头
sintered tungsten carbide compact bit
复合球齿钻头
composite diamond-tungsten carbide button bits
地球非球形摄动
earth oblateness
nonspherical perturbation
地球非球形引力摄动
Earth nonspherical gravitation perturbation
月球非球形
moon non-spherical perturbation
合金球齿
globular tooth madding with alloy
钛合金球形容器
spherical Ti alloy vessel
碳化钨球齿钻头
tungsten carbide button bit
硬质合金球齿自压模
the automatic pressing mould of cemented carbide spherical shape bits
凿岩球齿合金
carbide for cylindrical compacts