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sltmac: ½ð±Ò+1 2012-05-28 08:18:38
ywmcumt666: ½ð±Ò+10, ·­ÒëEPI+1 2012-05-28 08:47:53
Rare earth  alloy is often fractured before its yield strength, because it has small recovery coefficient, but has hardly any plasticity.
3Â¥2012-05-28 06:27:29
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