Ключевые слова: access, assembly, builder, cesspool, cleaning, communication, communications, concrete rings, construction, drainage, equipment, fecal, ground, hole, industry, installation, maintenance, male, manhole, manhole sewage, men, pave, pipeline, plumbing, pumping out, purification, reservoir, round, rural, sanitary, sanitation, septic, septic tank, sewage, sewer, sewer well, sewerage, tank, toilet, underground well, utility worker, water utility, work, worker,