| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide drain through fittings and their fitting method, which prevent water from flooding a room by the water pressure of underground water, etc. SOLUTION: The through-fittings have an approximately cylindrical body part 1, and a cable inserting hole 2 and an inserting hole 4 for a clap screw 3 are formed in the axis of the body part 1. New through-fittings, and their fitting method, constituted by penetrating and arranging a watertight insulated cable 5 in both holes 2, 4 fitting a ring-shaped packing 7 and washers 6, 8 in the inserting hole 4 for the screw 3, and screwing and pressing the upper surface of the washer 8 by the lower end of the screw 3.</p> |
