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PURPOSE To investigate the diet of patients with cervical cancer and precancerosis in the Wufeng area, a high- incidence region in China. METHODS In the case group, 104 patients diagnosed with cervical cancer or cervical intraepithelial neoplasias (CINII/III) were recruited from the Wufeng area. Nine hundred thirty-six healthy women were selected from the(More)
This article takes the helium optically pumped magnetometer which is widely used in mineral exploration and space magnetic field measurement as research object. It describes the principle of magnetic sensor and the basic structure of automatic tracking circuit. The research focuses on the modules of signal processing, frequency measurement and data(More)
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