| 单词 | packing-board |
| 释义 | > as lemmaspacking-board ΘΚΠ society > occupation and work > equipment > earth-moving and excavating equipment > [noun] > tunnelling equipment poling board1837 shield1837 packing-board1850 pilot tunnel1881 subterrene1956 mole1960 1850 Ordnance Man. for Use of Officers (U.S. Army Ordnance Dept.) (ed. 2) 200 Packing boxes for swords and sabres..furnished with packing boards or partitions made with grooves to receive the scabbards. 1881 Dict. Archit. (Archit. Publ. Soc.) Packing-board, the term applied to the boards used with poling boards over the intended soffit of an arch in tunneling, to the top of the heading wherever the earth shows symptoms of falling in. < as lemmas |
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