Cov qhov rooj hluav taws kub steel muaj lub suab rwb thaiv tsev zoo thiab thermal rwb thaiv tsev. Hlau qhov rooj hluav taws tuaj yeem txuag hluav taws xob, hluav taws xob thiab cua sov. Lub qhov rooj hluav taws steel muaj zoo airtightness. Thaum nws raug kaw, nws yuav raug kaw kom nruj, thiab nws yuav tsis tawm ntawm lub qhov rooj thiab ua rau cov cua txias thiab cua sov dhau.

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