R20 broken channel

R20 crack-reconstructing

R20 pipe bracket encasing in concrete

R20 installation of a STZ-carapace

R20 pipe end reconstructing 1

R20 pipe end reconstructing 1

R20 shaft-reconstructing 1

R20 shaft-reconstructing 2

R20 shaft-reconstructing 3

R20/10 filling fugues of a leaky cistern

R20/40 hospital Tournelles

R20 - KA20 channel-crossing