Objective To understand the incidence of the fetal deformity and ultrasound diagnostic accordance rate, and provide guidance for early clinical interference.
目的了解胎儿畸形的发生率以及超声诊断的符合率，为早期临床干预提供依据。
Built in self test, diagnostic procedures, error automatically prompts and can automatically measure and display the ambient interference.
〇内置自我诊断程序，开机自检，出错自动提示并能够自动测量和显示周围环境的干扰情况。
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