| 单词 | safety nut |
| 例句 | An excellent method of preventing a nut from slackening back of itself is shown in the safety nut in Fig. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The oxygen valve also includes a safety nut having a small hole through it closed by a fusible metal which melts at 250° Fahrenheit. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon |
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