Theko ea 'maraka oa methylene chloride ea lehae e theohile, cheseho ea 'maraka ea ho boloka thepa e ntlafetse haholo, lik'hamphani tsa Shandong le libaka tse ling li romelloa ka mokhoa o boreleli, 'me theko e bontšitse matšoao a totobetseng a ho khutla hape. Pele ho matsatsi a phomolo, barekisi ba ikemiselitse ho lokisa thepa ka litheko tse tlase. Maobane, malapa a mangata a maholo a ne a nkile thepa e ngata. Leha ho le joalo, barekisi ba bang sebakeng se ka boroa ba itse ho ntse ho na le monyetla oa hore leqhubu le latelang la litheko tse tlase le fihle pele ho matsatsi a phomolo, 'me thepa e liehe.

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