English: 123 block: A 1 x 2 x 3 inch precision steel block commonly used as a square reference or mount point when milling. Often comprised of blank holes or taped screw holes to add objects to be firmly bolted to it.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.