This paper presents the development of acoustic immittance apparatus and application in diagnosis of ear disease.本文详细介绍了声导抗测试技术的发展及在耳科疾病诊断中的应用.This paper presents the contactless control of flasher with triode.提出了用三级管导通和...
Lifespans ranged from three years for the mice, to 23 or more for common backyard squirrels.动物寿命从3年(老鼠)到23年甚至更多(普通的庭院松鼠).They've been called Shorts , due to their small stature but also their brief lifespans.根据他们矮小的...
Such as: to punch knives, batons and other embossing machine components.如: 改打孔刀 、 压花棍等机器各部件.Braille typewriters and electric embossing machines are also used.布拉耶盲字可以使用打字机,近来还有电动凸版机的发明.Pebbling: The process of embossing p...