| 单词 | plank-timbering |
| 释义 | > as lemmasplank-timbering plank-timbering n. Mining rare the action of lining a shaft with frames constructed from planks. ΘΚΠ society > occupation and work > industry > mining > [noun] > lining of pit-shaft tunnelling1686 tubbing1839 plank-timbering1881 well tubbing1898 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 164 Plank-timbering, the lining of a shaft with rectangular plank frames. < as lemmas |
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