excess-oil return line

hydrogen gas return line

Return line

steam return line

AC line filter

line filter

active power filter filter

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

revoling leaf type filter + vacuum filter

a point of no return

a point of safe return

A Return of Order(and discipline) in Architectural Design

a return to cultural roots

a tax return

abnormal excess return