The distance traveled by waves with no obstruction.
海浪没有阻碍物时所经过的距离。
ResultsThe clinical manifestation in this case had no the characteristic appearance with the invasion of the meninges; the MRI performance was the ventricles obstruction and hydrocephalus.
结果该例黑色素瘤临床表现无特征性，病变侵及脑膜，MR I表现为脑室梗阻、脑积水。
Sensors can be mounted without shutting down flow and there is no obstruction or pressure drop. Flow rate and totalizer are displayed continuously along with battery status, signal strength.
传感器可以安装无需关闭流，也没有阻挠或压力下降。流量积算显示和不断随着电池状态，信号强度。
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