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долотчатый бур stresses
construct.	chisel jumper; moyle
mining.	spade-type bit
O&G	bull bit; flat bit; moil; spade bit; two-point bit
oil	chisel bit
railw.	flat-ended chisel
tech.	chisel-shaped bit; chisel jumber; flat jumber

долотчатый бур: 13 phrases in 4 subjects

Military	1
Mining	4
Oil / petroleum	4
Oil and gas	4