常见例句Bierbaum scratch hardness equipment 比尔鲍姆刮刻硬度仪Bierbaum microcharacter 比尔鲍姆微压痕硬度计Bierbaum scratch hardness 比尔鲍姆划痕硬度Bierbaum scratch hardness test 贝包姆划痕硬度试验 返回 Bierbaum