| 单词 | trigger-block |
| 释义 | > as lemmastrigger-block trigger-block n. a piece of mechanism in a steam-engine, which automatically allows the steam-valve to close when a certain speed is attained. ΚΠ 1893 D. K. Clark Steam Engine III. 58 A square trigger-block..slides vertically through..the catch-block. < as lemmas |
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