| 单词 | bottoming hole |
| 释义 | > as lemmasbottoming hole bottoming hole n. Glass-making (now historical) an open furnace mouth at which a globular mass of glass is softened and partially flattened during the production of crown glass. ΘΚΠ society > occupation and work > equipment > furnace or kiln > furnace > parts of furnace > [noun] > other parts of furnaces sump1673 stoking-hole1683 stoking-place1744 mid-feather1748 bottoming hole1815 trunnel-head1819 keystone1821 vault1825 well1825 nose-hole1832 fore-stone1839 nose1839 tongs-carriage1839 tunnel-head1843 glory-hole1849 1815 S. Parkes Chem. Ess. III. xi. 432 It [sc. the glass] is immediately transferred to the furnace called the bottoming-hole, to be again heated. 1839 A. Ure Dict. Arts 582 This spheroid having become cool and somewhat stiff, is next carried to the bottoming hole. 1903 Encycl. Brit. (new Werner ed.) X. 660/1 The blower now heats a third time at the ‘bottoming hole’, and blows the metal into a full-sized flattened spheroid. 1971 A. Pepper Glass Gaffers New Jersey 60 The blower would form a pear-shaped globule of glass which he then moved down to the ‘bottoming’ hole, in front of which was a low wall to protect the man against the heat, where he twirled the parison which caused it to spread out. < as lemmas |
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