... to absorb water and moisture,it has a high degree of preservation . 4, acid resistant refractory: the thermal conductivityof ... stable tone, thus is how "Qin Tong" known. The board of the dulcimer, pipa, Qin Hu and Liuqin are all ... boards,princess and room partition board and so on.It also has the advantages of impenetrable, insect-proof etc., ... T, L/C ,D/Pdelivery time15days wall panel of solid board