|  Plan, design,
construction and supervision of various facilities and systems
for disposing wastewater and sewage
Improvement,
repair, budget evaluation and certification rendering of various
facilities and systems for disposing wastewater and sewage
Plan, design,
construction and supervision of water treatment systems for industry,
swimming pool and drinking
Sale of equipments,
filters and drugs used for water cleaning
Plan, design,
construction and supervision of air pollution control equipments
and facilities
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