1.Breathability Breathability yuav tsum tau txiav txim siab rau tarpaulins, tshwj xeeb tshaj yog rau cov tub rog tarpaulins. Cov yam ntxwv cuam tshuam ntawm huab cua permeability muaj xws li cov qauv substrate, ntom ntom, cov khoom siv, hom dej tsis huv, resin adhesion, thiab lwm yam.
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