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
bringing more convenience to the people in their daily life; providing amenities for the people; making life easier for the population
life saving apparatus [= life saving appliance]
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