| 单词 | heavy hammer |
| 释义 | heavy hammer Their tools were a heavy hammer and a bar with a chisel shaped end. Retrieved from Wikipedia CC BY-SA 3.0 Originally spikes were driven into wooden sleepers by hammering them with a heavy hammer by hand. Retrieved from Wikipedia CC BY-SA 3.0 The work involved swinging a heavy hammer to strike pieces hot metal of positioned by the smith. Retrieved from Wikipedia CC BY-SA 3.0 It had a built in back bottle setup that ran on liquid and was very inefficient, due to the small valve and heavy hammer (nearly 1 pound). Retrieved from Wikipedia CC BY-SA 3.0 Once the ore was removed, it would be crushed by heavy hammers, probably automated by a water wheel until reduced to a fine dust. Retrieved from Wikipedia CC BY-SA 3.0 |
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