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комовая сера stresses
gen.	block sulphur
construct.	lump sulphur
gas.proc.	solid sulphur (Alexander Demidov)
Gruzovik, chem.	block sulphur
O&G, sakh.	block sulfur
O&G, tengiz.	block; bulk; crushed sulfur (Yeldar Azanbayev); cast-in-place sulfur block (Yeldar Azanbayev)
tech.	brimstone; sulfur in lumps; sulphur in lumps
комовая твёрдая сера
oil	block sulfur (andrushin)

комовая сера: 2 phrases in 2 subjects

Oil and gas	1
Sakhalin	1