Here is the essential information for the supplier regarding the purchase: # Object of purchase * What is being purchased: Steel interior doors. * Key technical requirements: * The door unit consists of a leaf, frame, and hinges. * Leaf thickness not less than 40 mm, sheet thickness not less than 0.6 mm. * Frame steel sheet thickness not less than 1.5 mm, with a built-in rubber gasket. * Sound insulation no worse than Rw=25…
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