HJA-6 with moderate activity and contraction.
HJA - 6具有适中的活性和收缩性。
HJA-5 crystal size is small, with high sintering activity.
HJA- 5晶粒度小，具有较高的烧结活性。
HJA-7 and HJA-8 has a high sintered density, contraction rate, for the production of high-grade refractory materials, temperature, wear-resistant corundum products.
HJA - 7和HJA - 8具有较高的烧结密度，地收缩率，适用于生产高档耐火材料，耐温、耐磨刚玉制品。
HJA-7 and HJA-8 has a high sintered density, contraction rate, for the production of high-grade refractory materials, temperature, wear-resistant corundum products.
HJA - 7和HJA - 8具有较高的烧结密度，地收缩率，适用于生产高档耐火材料，耐温、耐磨刚玉制品。
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