| 单词 | purchase block |
| 释义 | > as lemmaspurchase block purchase block n. Chiefly Nautical = block n. 2a. ΚΠ 1782 J. Smeaton Let. 7 Feb. in Reports (1797) I. 411 Two pair of purchase-blocks capable of purchasing 15 or 20 tons each. 1838 Civil Engineer & Architect's Jrnl. 1 148/2 With the assistance of double and single purchase-blocks. 1993 Metrop. Museum of Art Bull. 50 51/1 The anchor chain borrowed from the Dessoug connected a drum in the engine to a purchase block that was firmly fixed in the street ahead. < as lemmas |
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