The collar is being attached to the movable part of the neck.

The collar is being attached to the movable part of the neck.

The neck's movable part and the collar are being fixed with screws.

Signals cables pass through the collar. Three cables, each of which is made by combining multiple signal lines, pass through the collar. The number of signal lines is as many as 90, but the number is smaller, compared with the first prototype (108). There is little extra space because actuators, mechanical parts, etc are located in the neck.

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