Lub qhov rooj hluav taws steel yog tsim los ntawm steel ncej thiab steel qhov rooj nplooj. Cov qauv hlau tuaj yeem ua kom ntseeg tau tias nws tsis yooj yim rau kev cuam tshuam deformation thiab kev puas tsuaj rau sab nraud, thiab tuaj yeem siv tau ntev ntev yam tsis muaj kev hloov pauv.

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