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Oil / petroleum
containing
形 心
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all forms
Chinese
English
三角柱形岩心
tricore
中心凹陷形钻头
concave inward bit
偏心套管整形器
eccentric casing swage
美国
国防测绘图局水文与地形中心
Defense Mapping Agency, Hydrographic, Topographic Center
环形磁心
toroidal core
筒形离心压缩机
cylindrical centrifugal compressor
锥形取心钻头
tapered core bit
锥形阶梯取心钻头
tapered step-core bit
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