Think about the brake disks on your car. If you get them wet, they rust. (wash your car and they will rust within the hour) The same is true with railroad tracks. The friction from the wheels grinds away any rust.
Unused credit lines
Pumping fuel to the injectors is one of the way of telling if the fuel lines are frozen. The remaining fuel that will be unused will be returned back through the return line.
Galvanized pipe is used for natural gas lines and pressure vent lines, and for electrical conduits. As a water supply or drain pipe, it is subject to rusting over time.
As of the latest available data, New South Wales has approximately 1,500 kilometers of unused or disused railway lines. These lines are often remnants of the extensive railway network that once connected various regions but are no longer in active service. Efforts are sometimes made to repurpose these corridors for walking, cycling, or other community uses.
the reason their are parallel lines because the person who invented them thought they were compulsory for maths
Yes. That's a big part of the reason why the lines are often called "parallels".
Why would you want to replace all the brake lines? You can flush the entire system and install fresh DOT3 brake fluid. I can see no reason to replace all the brake lines. Why are you doing this? Unless your brake lines are rotted out or someone has cut them... there is no reason to replace all four lines.
Not--It smudges the lines and makes them harder to see
Yes there is no reason why not.
A. are influenced by PACs
Maybe there are weak capacitor and ready to collapsed
Every line of constant latitude is parallel to the equator and to all other such lines. This might be part of the reason that such lines are often referred to as "parallels" of latitude. Or that might be just a coincidence.