Grating.
But on a ladle positioning car.
the car goes east-west.
When you move the car, you have to hoist up, so it doesn't smash stuff.
It hoists a 650,000 lb ladle, so, if the transducer cable is caught in that grating, it can't go up with it.
It tears the cable up.
Then the operator calls, cause the level control system won't work.