Optimum line length of sight
optimum proportion of asphalt
optimum proportion of asphalt to aggregate
optimum proportion of matrix
Double line-line voltage control
line-line extreme distance
line-line topological relation in traffic network
loss-free line (=lossless line =lossless transmission line)
SDSL Single-Line Digital Subscriber Line，Single-Line DSL
Fishing boat optimum main engine optimum auxiliari
to approach the optimum from non-optimum
10-line to 4-line BCD encoder
A line used as both sterile and maintaining line
agonic line {agonic line of no declination}
cytoplasmic male sterile line CMS-line
double line to line voltages
double line-to-line voltage control