| 单词 | spring contractor |
| 释义 | > as lemmasspring contractor ΚΠ 1843 Civil Engineer & Architect's Jrnl. 6 245 Description of Lieutenant D. Rankine's [Railway] Spring Contractor. 1866 Ann. Rep. Commissioners Patents 1864: Arts & Manuf. I. 951 in U.S. Congress. Serial Set (38th Congr., 2nd Sess.: House of Representatives Executive Doc. No. 51) The arrangement and combination of the spring contractor E with the barrel and the magazine provided with a spring and follower, as specified. < as lemmas |
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