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VT / HT Series Litanka tsa polokelo tse tloaelehileng
Litanka tsa li-serial tsa BTCE VT kapa HT li etselitsoe ho boloka LIN, LOX, LAR, tse nang le litanka tsa polokelo tse otlolohileng (VT) kapa tse rapameng (HT) tse nang le vacuum perlite kapa super insulation.