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standard time
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把地球按地理经度分为24个时区,每一个时区包含地理经度15°。每一时区都按它的中央子午线来计量时间,即采用它的中央子午线的地方平时,叫作标准时。
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police cryptography
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police dog appliying technnology
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Police Education and Training
police education and training
police emotion management
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Police Equipment Design Committee of Ministry of Public Security
police external supervision
police force composition at crime scene
police force dispatch
police geographic information platform
police guarantee culture
police image and discipline
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police impression management
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