Features：
1. Lifelike appearance, realistic texture
2. Clear anatomical landmarks, include the inferior edge
of costal arch, xiphoid, anterior superior iliac spine,
iliac crest, etc.
3. Interchangeable between left and right lateral position for abdominal shifting dullness percussion
4. Abdominal puncture can be practiced when model lies
in tilt position or left lateral postion.
5. Successful puncture will feel realistic feedback, allow
extracting seroperitoneum