| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a strong structure with respect to deformations due to solar energy, earth pressure, etc. by further increasing its strength, in the troughs having waves of the constitution used outdoors by laying or burying. <P>SOLUTION: The troughs with waves and apparatus thereof consist of a base B housing cables and a cover C covering the base B, the base B and the cover C are provided with protruded parts 1, 11 of prescribed pitches in the width direction, to be formed into an irregular shape along the lengthwise direction; moreover, the pitch of each protruded part of the base B and the cover C is equal to or is in integral multiple relation, a fitting part 13 appearing in an opening side of the protruded part 11 of the cover C are troughs with waves made fittable to the outside of a fitted part 3 appearing in an opening side of the protruded part 1 of the base B; a recessed part 1' in an inner side of the base B or a recessed part 12 in the outside of the cover C is formed with a structure, capable of inserting and holding reinforcing tools R<SB>1</SB>, R<SB>2</SB>of a substantially U-shape. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
