A machine should at least pass the breakeven point before the end of its useful life.

Conventional track supporting rollers have metal tread portions which generated objectionable noise and impact between the track and the treads.

Their own collisions with one another produce an alien social power standing above them, produce their mutual interaction as a process and power independent of them.

Their own collisions with one another produce an alien social power standing above them, produce their mutual interaction as a process and power independent of th ...

I've never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I've never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I’ve never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I've never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I've never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I’ve never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I’ve never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I've never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I've never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I've never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.

I’ve never felt such a mixture of extreme emotions in my life, never dreamed I could feel simultaneously heartbroken and euphoric.