孕镶金刚石取心钻头
diamond impregnated bit
impregnated diamond coring bit
孕镶金刚石钻头
Diamond impregnated bits
diamond impregnated drilling bit
impregnated diamond bit
diamond-impregnated bit
针状金刚石－合金复合式钻头
impregnated diamond-tungsten carbide bar bits
针状硬质合金－金刚石复合型钻头
drill bit of impregnated diamond and tungsten carb
整体不提钻换钻头
integrally retractable alternative cutting element