| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication cable protection tube reduced in weight, easy in handling, easily installable at a construction site, improved in fireproof performance, and easy in maintenance, and to provide an equipment structure of the tube. <P>SOLUTION: The communication cable protection tube is characterized by comprising a jacket, composed of an inner cylinder that is coated on a communication cable and has a faucet at its one end and a spigot at the other end, and an outer cylinder that coats the external periphery of the inner cylinder except for the faucet at prescribed intervals by an interval holding member. The tube is also characterized in that the lids are attached to both ends of the outer cylinder; the inside of the jacket is sealed; a water filler port is arranged in the vicinity of one end of the outer cylinder; and an overflow port is arranged in the vicinity of the other end of the outer cylinder. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
