Hardness, specific gravity and thermal stability of garnet product.
石榴石产品硬度，比重，热稳定性测定。
Inspect the hardness of product material.
检验产品材料的硬度。
Some product applications require properties of hardness and strength to resist penetration under high pressure and to provide maximum wear qualities only on the surface.
一些产品的用途决定其需要具有耐高压压溃的硬度和强度特性以及表面的耐磨性。
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