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i used to sandblast on bridges; then later on deep mine equipment with water/sand with so much power could still see spark in darker corners. Small grains can do all that as ally, but then too can tear up rope internals as foe, can do same razor thinned edge of steel tooth and face plates that...

i see what you mean; but meant as these surfaces hone to edge, that cuts yes as surface sides can also serve to cleave apart wider; >>all in all a destructive cutting/grinding machine when given power. . i believe i am quoting some far off memory about sand 18 sides/edges average. >>but in any...

Sometimes cut to Dutch in direction of proposed pull is needed to get snap easiest. Can even cut face up and backcut down and throw rock in upward face. As long as solid stop inner and 'nose' of face still allowed to turn passed that point. . Like the slant cut for more linear compression of...