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Knurl properties. Module knurl( k_cyl_hg = 12, module knurled_cyl(chg, cod, cwd, csh, cdp, fsh, smt crn=ceil(chg/csh); echo("knurled cylinder min diameter: ", 2*cird); if( fsh < 0 shape(fsh, cird+cdp*smt/100, cord, cfn*4, chg); module shape(hsh, ird, ord, fn4, hg y0=-0.1; y1=0; y2=abs(hsh); y3=hg-abs(hsh); y4=hg; y5=hg+0.1; if ( hsh >= 0 ) { union() { cube([board_width, board_height, thickness]); cylinder(thickness+standoff_height, r=standoff_radius, $fn=360); cylinder(h=thickness+standoff_height, r=standoff_radius, $fn=360); cube([cutout_width, cutout_height, thickness+3]); cylinder(h=thickness+standoff_height+3, r=hole_radius, $fn=360); vertex 0 -7.40505 6.86814 facet normal -0.451284 0.84429 0.288993 facet normal -3.330393e-001 5.682186e-001 7.524709e-001 vertex 3.522607e+000 -2.783908e+000 2.491820e+001 facet normal -2.137221e-001 3.645507e-001 9.063253e-001 vertex -4.386413e+000 3.439340e+000 2.494118e+001 facet normal -1.087091e-001 -4.840734e-004 9.940735e-001 vertex 4.244207e+000 -8.356673e-001 2.495526e+001 facet normal -6.797594e-001 -2.793198e-003 7.334298e-001 vertex.

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