| 单词 | seating block |
| 释义 | > as lemmasseating block a. (of sense 4), as seating block, seating-face, seating plate. ΚΠ 1838 Civil Engineer & Architect's Jrnl. 1 178/1 The masonry at each end [of the bridge] was ready to receive the cast-iron seating plates of the wood arch. 1884 Internat. Health Exhib. Official Catal. 55/1 Boiler Seating Blocks. 1925 Morris Owner's Man. 77 These two photographs show a valve before..and after grinding-in. Note the different appearance of their seating faces. < as lemmas |
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