镶碳化钨硬合金齿钻头
sintered tungsten carbide compact bit
复合轮齿齿轮副
complex wheel teeth gear set
钢齿牙轮钻头
steel tooth bit
steel tooth roller cone bit
镀铬镶合金齿厚卡尺
chromium-plated tooth thickness calipers
聚晶金刚石镶齿钻头
insert polycrystalline diamond bit
烧结碳化钨硬质合金镶齿
sintered tungsten-carbide insert