An inflatable PFD has less bulk and interference than a foam unit, but is ready to provide flotation during an unexpected entry into the water.
可膨胀的PFD有较少的体积和没有了干扰泡沫单位，但在想不到的进入水后实时提供漂浮。
2
This infrared telemetry system can be used in the environment with high electromagnetic interference, such as the operating room with electrosurgical unit and become an important monitor device.
该多道遥测系统可应用在诸如电外科手术等强电磁干扰的环境下，作为患者监护的重要手段。
3
A miter saw having a laterally tiltable cutting portion and a fence unit that supports a workpiece without mechanical interference with the cutting portion regardless of its laterally tilting posture.