A line used as both sterile and maintaining line

agonic line {agonic line of no declination}

Dual purpose line with nucleic male sterile line

Fault Cutoff Line Allan Line

Male sterility line and maintainer line

velocity line of arc line short band

air tight

air tight concrete

air tight construction

air tight door

air tight locker

air tight pressure test

Air Tight Seal

air tight silo

air tight test

air-tight

airtight

arc-tight

asymptotically tight bound

bubble-tight