| 单词 | sinking-chain |
| 释义 | > as lemmassinking-chain ΘΚΠ society > occupation and work > equipment > piercing or boring tools > [noun] > boring tool > for boring in the ground > equipment for use with sinking-chain1820 runner1839 rotary table1845 wad hook1881 socket1883 spreadera1884 whipstock1903 1820 Edinb. Encycl. (1830) XIV. 374/1 The beam centered at c, having an arc head and martingale sinking-chain. < as lemmas |
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