What is an advantage of automatic slack adjusters over manual ones?

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1. They eliminate the need for any brake inspections at all, since the system is fully self-correcting for every kind of mechanical brake fault
2. They continually compensate for normal brake lining wear, reducing the chance of the brake falling out of adjustment between inspections
3. They only work on trailers, not tractors
4. They apply more braking force than manual adjusters

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