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Tracing roughneck lines

This consists in tracing the cutting line on the block of stone's upper face, always respecting the length and width safety margins which depend on the type of stone that is being dressed and of the piece's final dimensions. The line is traced on both sides, ensuring that the lines are parallel with each other. If the block is very thick, it is advisable to use the help of both rulers arranged, and perfectly aligned on each side, to trace the cutting line correctly.