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rig substructure
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rig substructure
Encyclopedia
工学
钻井装备
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rig substructure
钻机底座
在钻机使用中,用于安装钻井设备、方便钻井设备的移运、传递作业载荷,并提供钻井作业操作场所和井口装置安装空间的钢结构。
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avian leukosis virus, ALV
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aviation
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aviation accidents classification
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aviation astronomy
aviation automatic test equipment calibration technique
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