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. 2015 Oct;7(10):E517–E519. doi: 10.3978/j.issn.2072-1439.2015.10.52

Figure 2.

Figure 2

The cross-section of the fractured and the man-made cut steel wires. The left wires show the sharp man-made cut section; the right fractured wires show the neat and smooth cross-section due to sudden stress increases.