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линии равных глубин stresses
gen.	bathymetric lines (ABelonogov)
nautic.	fathom lines
линия равных глубин
gen.	contour line
nautic.	isobath curve
O&G	depth curve; depth line
oil	isobath
линия равной глубины
el.	fathom; isobath; isobathic curve; isobathic line