PBX systems uses PSTN lines to connect another PBX system over a long distance.
lines that are beside each other and never meet
Perpendicular and parallel lines are two examples.
hrm
That's the only kind of parallel lines there are, non-intersecting!
There is brake fluid in the lines of a braking system. The type of brake fluid may be different dependent on the year, make and model of the vehicel.
inactive
Cancer tissues are not density dependent.
PBX systems uses PSTN lines to connect another PBX system over a long distance.
intersecting lines divergent lines convergent lines
Straight lines.
Parallel lines
lines that are beside each other and never meet
They are undefined lines.
Straight ones... Not truly lines, but segments
Mutually perpendicular lines.
Perpendicular and parallel lines are two examples.