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古代北京城水利
释义
古代北京城水利
Encyclopedia
工学
〔中国古代城市水利〕
释
water conservancy of ancient Beijing city
古代北京城水利
北京位于永定河与潮白河洪积冲积扇脊部,这两条河都距城区较远流过,引用存在许多困难。北京降水量年内分布很不均匀,总径流量偏少,自古就是缺水地区。开发利用永定河与潮白河水资源并防止其洪水灾害,是古代北京城水利的重点。
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telegraphic communications
telegraphic speech
telegraph signal
telegraphy
teleiophane
telelectroscope
telelens
Telemaco Signorini
Telemarketing
telemedicine
telemeteorometry
telemeter
telemetering
telemetering device
telemetering monochrometer
telemetry
telemetry data processing
telemetry data reception of launch vehicle
telemetry for nuclear weapon
telemetry for strain measurement
telemetry frequency band
telemetry moniter and control
telemetry transducer of launch vehicle
telemetry transmitter of launch vehicle
telemicroscope
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