Mofanana ndi makampani opanga magalimoto, zitsulo ndi aluminiyamu ndizo zida zazikulu zomwe zimagwiritsidwa ntchito popanga matupi a sitimayi, kuphatikizapo ma boardboard a sitima, denga, mapanelo apansi ndi njanji za cant, zomwe zimagwirizanitsa pansi pa sitimayo ndi khoma lakumbali.Aluminiyamu imapereka maubwino angapo ku kuthamanga kwambiri ...
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