| 单词 | turnover board |
| 释义 | > as lemmasturnover board turnover board n. Founding a flat board on which a flat-bottomed pattern or half-pattern may be stood for sand to be rammed round it. ΘΚΠ society > occupation and work > equipment > metalworking equipment > [noun] > casting equipment > sand-moulding equipment box1813 sandbox1833 sand-mould1843 pig bed1850 turnover board1888 sand-slinger1928 1888 Lockwood's Dict. Mech. Engin. 391 Turn over board, a board used for ramming a pattern upon. 1928 W. Rawlinson Mod. Foundry Operations xiii. 168 A method adopted in certain instances of repetition work..is that of a ‘turnover board’, also termed ‘bottom board’ or ‘joint board’. 1964 S. Crawford Basic Engin. Processes (1969) x. 238 The flat face of the pattern is placed on a turnover board and a suitable size moulding box..is placed over it. < as lemmas |
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