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三、四等水准测量,选用双面尺时,观测次序为后黑一前黑一前红一后红。()...
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安全生产管理是以()的发生,保证(),促进生产发展为目的。...
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当用DJ2经纬仪进行10″小三角测量时,其测回数为()测回。A、1B、2C、3...
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