The excellence of portable high-frequency vibroseis (PHV) mainly lies in high-resolution and free choice of sweep frequencies.
可控震源具有分辨率高、频率范围选择自由、能量频谱有一定可控性等优点。
Experiments in Tangshan area demonstrated that PHV works efficiently and stable, and has advantages over other non-explosive seismic source.
PHV在唐山地区的实验结果证明它能够稳定、有效的工作，而且优于其它非爆炸性震源。
When the 3 major hepatic veins are seriously obstructed, recanalization of the PHV is an effective approach to the hepatic vein type of BCS.
在3支主肝静脉严重阻塞时，开通副肝静脉是治疗肝静脉型BCS的有效途径。
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