Chimodzi mwazinthu zodziwika bwino za quartz ndi ngati khitchini yokhazikika.Izi zili choncho chifukwa chakuti zinthuzo sizimamva kutentha, kuthimbirira ndi kukwapula, zomwe ndizofunikira kwambiri pamalo olimbikira omwe nthawi zonse amakhala ndi kutentha kwambiri.Ma quartz ena, apezanso NSF (National ...
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