Guard njanji mbale
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Guard njanji mbale ndi MS malata makatoni
Ndilo mtundu waukulu wa semi-zitsulo guardrail, ndi malata zitsulo guardrail mbale splicing wina ndi mzake ndipo mothandizidwa ndi ndime mosalekeza dongosolo.Ili ndi mphamvu yamphamvu yotengera mphamvu zakugunda