| 单词 |
herbert pendulum method |
| 释义 |
Herbert pendulum method Herbert pendulum method[′hər·bərt ′pen·jə·ləm ‚meth·əd] (metallurgy) Hardness testing in which a 1-millimeter steel or jewel ball resting on the surface to be tested acts as the fulcrum for a 4-kilogram compound pendulum of 10-second period; the swinging of the pendulum causes a rolling indentation in the material, and several hardness factors, such as work hardenability, are determined. |
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