三血管切面测量主动脉及肺动脉诊断孕中晚期胎儿大动脉异常
삼혈관절면측량주동맥급폐동맥진단잉중만기태인대동맥이상
Ultrasonic measurement of aorta and pulmonary on three-vessel view in screening large arteries abnormities during the second and third trimesters
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