Limitations of diagnostic ability existed in traditional methods as M echocardiography, PW and electrograph.传统方法M型超声 、 PW及胎儿心电图均具有应用局限性....

n.电位记录器，传真机，电雕刻器，电描记器...

electrograph的音标：electrograph的英式发音音标为：[ɪ'lektrəˌgrɑ:f]electrograph的美式发音音标为：[ɪ'lektrəˌgrɑf]...