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与此同时，人造石英石的二氧化硅含量超过90%，远超花岗岩和大理石等天然石材(如花岗岩的二氧化硅含量小于30%，大理石的二氧化硅含量小于5%)，加工时会产生大量高浓度粉尘。粉尘中含有游离二氧化硅，是矽尘的主要成分。长期吸入矽尘，易导致矽肺病，即尘肺病中的一种。，更多细节参见PDF资料
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ModelCompositionFirmnessHeightCooling?Trial PeriodSaatva ClassicThree-inch pillow top with lumbar support, plus two different coil layersThree options, luxury firm is a 6/1011.5 or 14.5 inchesNo365 nightsBear Elite HybridFive-layer hybrid with zoned coilsThree options, firm is a 7.5/1014 inchesYes120 nightsHelix Sleep Twilight Luxe with ErgoAlignSix layers of foam and coilsOne option, 8/1013.5 inchesNo (unless you choose cooling pillow top)100 nightsSonu Sleep SystemThree layers of foam; hybrid has two foam and one coil layerThree firmness levels, plush is 4/1013.5 inchesCooling cover100-night trialSaatva RxSeven layers of foam and coilsOne option, supportive plush is about 5/1015 inchesNo, but has phase change material365 nightsCharles P. Rogers Estate Tradition MattressSeven layers of latex, gel, and coilsOne option: gentle firm is around a 7.5/1013 inchesNo100 days of delivery
В США забеспокоились из-за передачи Россией Ирану разведданных14:07。新收录的资料是该领域的重要参考