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ロックウェル硬さ
1. Rockwell hardness
2. Rockwell scaleThe Rockwell scale is a hardness scale based on the indentation hardness of a material. The Rockwell test determines the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetration made by a preload. There are different scales, denoted by a single letter, that use different loads or indenters. The result is a dimensionless number noted as HRA, where A is the scale letter.
Read “Rockwell scale” on English Wikipedia
Read “ロックウェル硬さ” on Japanese Wikipedia
Read “Rockwell scale” on DBpedia
Read “Rockwell scale” on English Wikipedia
Read “ロックウェル硬さ” on Japanese Wikipedia
Read “Rockwell scale” on DBpedia
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