| 摘要 |
FIELD: transport. ^ SUBSTANCE: soil is removed from the pipeline in the defective section, a trench is made, the device lower part is immersed into water and led to under defective section. Now, the device upper part is immersed to be coupled with the lower part. Water is forced from the device. Prior to immersing the device upper part, two pairs of hollow glands are arranged symmetric about the defective section filled with expanding substance. The space between hollow glands, closer to the defective section, are filled with a molding substance, and that to the right and left of the said glands is filled with a hermetic. ^ EFFECT: expanded performances. ^ 5 cl, 1 dwg |
