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тёмные нефтепродукты stresses
nautic.	dark petroleum oil; dirty oil; Dirty Petroleum Products (Ying)
O&G, oilfield.	dark oil products
O&G, tengiz.	heavy petroleum products
oil	black oil (glenfoo)
тёмный нефтепродукт
O&G	heavy petroleum product
O&G. tech.	dark oil product
oil	dark-oil product (напр. отработанное масло)
tech.	black product

тёмные нефтепродукты: 4 phrases in 3 subjects

Makarov	1
Oil / petroleum	2
Technology	1