anisotopic element,mononuclidic element

Objective To study the clinical value of B ultrasound in the diagnosis of ureterolithiasis without ipsilateral kidney hydrocele.

目的　探讨B超诊断输尿管结石无同侧肾积水的临床应用价值。

The development of three phase trigger circuit for nonsynchronous transformer;

无同步变压器三相触发电路