ultrason

Treatment of biliary stricture by percutaneous transhepatic insertion of metallic stent under the ultrason

超声引导胆道内支架植入术治疗胆道狭窄

These methods are not only suitable for examination of the concrete whose strength value is 20~ 120MPa, but one of them, i. e. acoustic velocity& water content combination method, also increase the precision of ultrason-ic pulse testing to a new stage.

此方法不仅适用于砼强度值为20～120MPa的工程检测，而声速&含水率综合法测强技术又使超声脉冲测试精度提高到一个新台阶。

Application of ultrason ic measuring system in Detecting System of Movement Robot

超声波测距在行走机器人感知系统中的应用

The result showed that the biofilm amount removed by ultrason-ic-plate method was higher than that removed by plate-swabbing method.

结果表明：超声波平板法对生物被膜的活菌计数优于棉花擦拭法；

Treatment of biliary stricture by percutaneous transhepatic insertion of metallic stent under the ultrason

超声引导胆道内支架植入术治疗胆道狭窄