| 单词 | power hammer |
| 释义 | > as lemmaspower hammer power hammer n. ΘΚΠ society > occupation and work > equipment > driving or beating tools > [noun] > hammer > mechanical and power hammers power hammer1856 1856 Littell's Living Age 1 Mar. 540/1 Most power hammers obtain their force by their accelerated velocity in their fall. 1973 J. G. Tweeddale Materials Technol. II. iv. 90 Most of the work done on power hammers is hot working of steels. 2001 C. H. Wendel Encycl. Antique Tools & Machinery 99/2 Over the years, hammers were developed especially for plow work, but with the coming of the power hammer, the work was much easier than before. < as lemmas |
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