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Isistimu yokuphakamisa isivinini esiphezulu
Ikheshi lephalethi elibuyiselanayo lakhiwe ikakhulukazi izingxenye eziyinhloko ezifana nedivayisi yokushayela, iplathifomu yokuphakamisa, ibhalansi ye-counterweight block, ifreyimu yangaphandle, kanye ne-mesh yangaphandle.