1)Probe:80 array, convex array Four display format: B、B+B、B+M、M、4B 2)Image grey scale: 256 levels 3)Freezing, real time, selective enlargement, upwards/downwards and left/right turnover of the image can be realized 4)18 types of position mark. 5)Fixed character, real time clock and calendar 6)Frequency Conversion: 2.0-9.9M(use when you change the housing probe) 7)Image magnification: *1.0、*1.2、*1.5、*2.0 8)Measuring: distance, perimeter, area, pregnant weeks etc. 9)cine 10)four-section electonic foucsing
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