*diatread,Diamond Tread Plate  (c)1990 Watson Kilbourne
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71.56505118,  .5,.1, -1.264911064,.632455532, .632455532,-2.529822128
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161.56505118, .1,.7, -1.264911064,.632455532, .632455532,-2.529822128
198.43494882, .1,.7,  1.264911064,.632455532, .632455532,-2.529822128
341.56505118, .9,.7, -1.264911064,.632455532, .632455532,-2.529822128