makes sense to also renovate manholes to render the entire system waterproof. old concrete manholes may be made watertight in two ways. . building a manhole made of a peh pipe inside a manhole. works are carried out on the spot or by using a welding extruder. the gap between the new and old manhole pipes...
with upvc pipes; electricity expansion project in greater banjul area. india created vocational training center (vtc) and incubation center (ic) in banjul and handed over to the gambian authorities in september . the centre is imparting training in disciplines such as plumbing, welding, electrical,...