this work, hereby publish it under the following license: English Screw Head. Recex Recess author name string: Andrew Pertsev Wikimedia username: Andrew Pertsev...
hereby publish it under the following license: English Screw Head. Crossed Slot with central recess author name string: Andrew Pertsev Wikimedia username:...
hereby publish it under the following license: English Slotted screw with a central recess. (European patent application. Registration number: 81102529...
of this work, hereby publish it under the following license: English Screw Head. Quadrex Plus author name string: Andrew Pertsev Wikimedia username: Andrew...
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