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National Land Surveying and Mapping Center: 01-白巨川老師上課情形1
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National Land Surveying and Mapping Center: 02-白巨川老師上課情形2
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National Land Surveying and Mapping Center: 03-白巨川老師上課情形3
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National Land Surveying and Mapping Center: 04-白巨川老師上課情形4
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National Land Surveying and Mapping Center: 05-學員實習課操作情形