Sandwich panel ndi mtundu wa mpanda wa malo omanga, womwe umagwiritsidwa ntchito pomanga mpanda, kukonzanso zomangamanga ndi zina zoteteza.chitsulo guardrail chimango ndi chokhazikika, kukana mwamphamvu, kothandiza kwambiri kuposa guardrail wamba.Chifukwa chimangocho chimapangidwa ndi ed chitsulo, mtundu wake ...
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