lead sheath 예문

• An extruded lead sheath over the paper cable was required to ensure that the paper remained absolutely dry.
• Paper insulated cables inside a lead sheath were used widely well until late in the 20th century ( may still be for all I know ).
• Cables intended for underground use or direct burial in earth will have heavy plastic or metal, most often lead sheaths, or may require special direct-buried construction.
• Cables for power distribution of 10 kV or higher may be insulated with oil and paper, and are run in a rigid steel pipe, semi-rigid aluminum or lead sheath.