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The way of reform and development of Engineering Drawing education is explored. Such activities have been carried out for 5 years, and great progress in the upd
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近一个时期,云贵等西南5省区市的严重干旱,造成了重大损失。大旱凸显出了当前水利基础设施建设的滞后。西南地区水利工程长期欠账,上世纪五六十年代修建的农田 In a recent
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