Influence about second time hardening plus tempering upon mechanical property of large scale steel casting
二次正火加回火对大型铸钢件机械性能的影响
Compression and hardening over long periods of time, the processes by which coal is formed from plant materials.
煤化作用经过长期压缩和硬化，植物成煤的过程
When it accumulated to a higher degree, the specimen began to shear and dilate after a short time of strain hardening.
达到一定程度后, 岩石表现出短暂的应变硬化, 岩石开始剪胀。
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