Pampiri e kopaneng ea litheipili etselitsoe ka ho khetheha bakeng sa ts'ebeliso ea pampiri e kopaneng leboteng le siling, tse loketseng manonyeletso a ho omella le tsa gypsum. Ho sebelisa sesebelisoa sena ho potlakisa motsoako o kopaneng ho etsa mesebetsi e mengata ea lebota le lekang.
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