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苏联ТесдаВедаскэйржйчй人民企业开始生产ЛУK260和ЛУД200两种新型的产科用的超声仪。它利用多普勒效应诊断胎儿状态。ЛУK260260型的整机由测量脉搏平均频率的心脏计数器、磁带录音机、自动记录器和监听器组成。它配备二种图形宽窄不同的定向聚焦探头。工作频率是2±3%兆赫超声波强度因探头不同而有7.5毫瓦/厘米~2和15毫瓦/厘米~2二种,心脏计数器的测量范围是30～250脉冲/分。ЛУД200型是上机的简易
The Soviet Union ТесдаВедаскэйржйчй People’s enterprises began to produce two new types of obstetric sonicators, the ЛУK260 and ЛУД200. It uses the Doppler effect to diagnose fetal status. The Model ЛУK260260 consists of a heart rate counter, tape recorder, auto recorder and monitor that measure the average pulse rate. It is equipped with two kinds of different width and orientation of the directional focus probe. The operating frequency is 2 ± 3% MHz. The intensity of the ultrasonic wave varies from probe to probe with 7.5 mW / cm 2 and 15 mW / cm 2. The heart counter measures 30 to 250 pulses per minute. ЛУД200 type is simple on the machine