Qhov rooj hluav taws yog ib feem tseem ceeb ntawm cov khoom siv hluav taws kub thiab kev tiv thaiv hluav taws. Lub qhov rooj hluav taws kub muaj cov thermal deformation qis thiab qis qis curvature tom qab cua sov. Thaum hluav taws qhib, nws tuaj yeem qhib thiab khiav tawm los yog kaw cov pa taws tawm thiab tos kev cawm.

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