There will be no damage to the stone after long use. It will not influence the air conductivity of the stone and will not change the natural color and luster of the stone.
长时间使用，保护石材不受损坏，不影响石材的透气性，不改变石材的天然泽。
The problem is the low thermal conductivity of air.
问题在于空气的热导率很低。
PTT knitted fabrics comfort properties of air permeability, moisture permeability and moisture conductivity were tested and evaluated.
对PTT针织面料的透气性、透湿性及导湿性等舒适性能进行了测试与评价。
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