impression hardness testing 压痕硬度实验 ; 压痕硬度试验
impression hardness 压痕硬度
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Brinell hardness, cone impression hardness, ball impression hardness.
布氏硬度，锥体压痕硬度，球体压痕硬度。
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Results There had difference on the surface smoothness and hardness of models made with different impression materials and different model materials.
结果不同印模材料采印及灌注的普通石膏模型，人造石和超硬石膏模型，其表面光滑度及硬度均有所差异。
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