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Kev kub ceev hoisting system
Lub reciprocating pallet of elevator feem ntau yog tsim los ntawm cov khoom tseem ceeb xws li cov cuab yeej tsav tsheb, lub lifting platform, qhov sib npaug ntawm qhov sib npaug, cov thav duab sab nrauv, thiab cov mesh sab nrauv.
