A cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting.
A double-stranded polynucleotide.
A dwelling unit with two floors
A throwing motion where two balls are thrown with one hand at the same time.
A system of multiple thrust faults bounded above and below by a roof thrust and floor thrust.
A house made up of two dwelling units.
Having two floors
Having two units, divisions, suites, apartments
Having horizons with contrasting textures.
Bidirectional (in two directions).
To make a series of duplex throws.
To make duplex.
To make into a duplex.