| 摘要 |
PURPOSE:To keep high quality without air embracement by providing a separator sheath which is formed by extrusion inside a flame proof sheath. CONSTITUTION:A cable core 1, an aluminum laminating sheath 2, a separator sheath 3 formed by extrusion and a flame proof PVC sheath 4 are constitutional elements. The aluminum laminating sheath 2 serving as a water-barrier layers is provided as necessary for adapting such atmosphere as underground wiring. In such a manner that the separator sheath 3 formed by extrusion is provided inside the flame proof sheath 4, there is no air embracement and no crater inside a sheath to improve quality. |
