... 测距杆 ranging rod 等级大小层系 rank-size hierarchy 急剧恶化的灾害;急剧恶化的事故 rapidly developing disasters ...
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... ranging accuracy 测距准确度 ranging rod 测距尺 ranging system 测距系统 ...
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ranging g rod 测量杆 ; 测距杆
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N a pole for marking positions in surveying 标尺测杆 (Also called range pole, range rod)
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