pure isolation

pure line

pure line breeding

Pure line LEW rat

pure line selection

pure line separation

pure line theory

Slow－ feathering pure line

Double line-line voltage control

line isolation

line isolation transformer

line-line extreme distance

line-line topological relation in traffic network

on-line line loss

loss-free line (=lossless line =lossless transmission line)

SDSL Single-Line Digital Subscriber Line，Single-Line DSL

10-line to 4-line BCD encoder

A line used as both sterile and maintaining line

agonic line {agonic line of no declination}