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词汇
北京古观象台
释义
北京古观象台
běi jīng gǔ guān xiàng tái
原名“观象台”、“瞻象台”。世界现存最完整的古观象台之一。在北京建国门南泡子河旁。于明朝正统年间1436-1449兴建。至今留有清制的八件仪象:天体仪、赤道经纬仪、黄道经纬仪、地平经纬仪、象限仪、纪限仪、地平经仪和玑衡抚辰仪。是全国重点文物保护单位。
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gas phase sedimentation
gas phase selective hydrogenation
gas phase separation
gas-phase separation
gas phase sequentor
gas phase silica
gas-phase silylation
gas phase solid
gas phase space
gas-phase space
gas-phase suspension process
gas-phase synthesis
gas-phase thermal catalytic decomposition
gasphase thermometric titration
gas-phase thermometric titration
gas phase titration
gas-phase titration
gas-phase titration calibrator
Gas phase transesterification
gas-phase turbulent flow
gas phase volume flow rate
gas phase while lamp black
gas phase xanthation
gas phlegmon
gas-phlegmon
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更新时间:2025/10/30 5:44:54