Instead of a fixed frog (the place behind the points where the tracks cross),
the gap is filled depending on the direction of the turnout.
It's a high maintenance device and is only used on very high speed rail.
(And on some cog railroads,)
The less movable attachment point of a muscle is called the origin. This is typically the point of attachment that remains relatively fixed during muscle contraction, while the other end, known as the insertion, moves towards the origin.
The origin is the "immovable" point of attachment of a muscle to a bone.
What are movable fin and movable exhausts use for? [Improve]
The indtroduction of firearms, and of movable walls made by wagons.
Insertion point, which most probably is a tendon.
from my point of view frog is the best
they are slightly movable
Yes an elevator is a movable pulley!
The noun form of the adjective 'movable' is movability.
Pulley in wells helps to pull the water because force is multiplied in movable pulley and in fixed pulley force is transfered from point to point.
Villi
Mark Twain's jumping off point (pardon the cheesy pun): The Celebrated Jumping Frog of Calaveras County. It was originally titled "The Notorious Jumping Frog of Calaveras County"