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commom的音標(biāo)：...

Commom internal dangerous defects of forging round steel are analyzed based on the production process.結(jié)合生產(chǎn)工藝過(guò)程,分析鍛制圓鋼常見(jiàn)內(nèi)在危害缺陷產(chǎn)生的原因....

adj.普通的，平常的...