Skilled brick repair - GIF

Skilled brick repair.

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Previously:

High accuracy brick stacking - GIF
Laser cleaning brickwork - GIF
Laying perfect bricks like dominoes - GIF
Loader brick handler - GIF
Molding mud bricks - GIF

I would imagine that involves taking the pieces of brick and grinding them up, but wonder what they are using for a binder? Impressive

How hard would it have been to drill through the mortar...