This lava stone has many better special functions than any other stone products,besides the general features same as the common stone materials it also has many other special features such as sound absorbing and insulation,heat absorbing and preservation,water absorbing and slide proof,Acid & alkali proof."Breathing function"etc.,and it is called "Functional stone materials" by the specialists in the stone materials line .It can be used safely in any places for its low radiation:and it is wind erosion proof and durable:Its function of sound absorbing and noise lowering is fit for improving the hearing environment: it is natural, primitive simplicity keep off the dizzy light,is fit for improving the visual sense environment; the function of its water absorbing and slide proof is fit for improving the body sense environment;the special funtion of "breathing" can adjust the air humidity and improve the ecology environment.
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