| 单词 | balloon apron |
| 释义 | > as lemmasballoon apron balloon apron n. now historical a defence against hostile aircraft consisting of a connected system of balloons carrying wire cables reaching to the ground; = balloon barrage n. ΘΚΠ society > armed hostility > hostilities in the air > aircraft weapons or equipment > [noun] > set of captive balloons apron1917 balloon apron1917 balloon barrage1919 1917 in H. A. Jones War in Air (1935) V. i. 68 On the 22nd of September [1917], in orders issued to home defence pilots, it was stated: ‘Balloon Aprons and other obstructions will be established.’ 1925 J. Morris Ger. Air Raids on Great Brit. ii. iv. 253 The balloon apron..consisted of steel cables suspended from a line held in the air by means of captive balloons. 1929 E. B. Ashmore Air Def. v. 55 I produced my idea for a balloon apron barrage to be put up just outside London and inside the aeroplane patrol lines. 1934 Times 5 June 11/2 The magazine..is defended by anti-aircraft guns and a balloon apron. 1999 L. Brown Radar Hist. World War II i. iii. 12 The attacks on London were stopped by mid-1918 but at a cost of deploying 376 airplanes, 469 AA guns, 622 searchlights, 258 height finders, ten sound locators and a balloon apron. < as lemmas |
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