각종 수처리 분야 (하수, 오수, 폐수, 오니) 제지공업, 식품, 석유 화학, 섬유공업, 금속공업제당, 유지공업, 주정, 전분, 요업, 광업, 건설업, 축산업 (우사, 돈사), 수산업
Various fields of water treatment (sewage, filthy water, wastewater sludge), paper industry, foods, petrochemical industry, fiber industry, metalworking industry, sugar-manufacturing industry, oil and fat industry, ceramic industry, mining industry, construction industry, livestock industry (cowhouses, hog bams), fishing industry