| 单词 | snapper grab |
| 释义 | > as lemmassnapper grab h. A sea-bed sampler that operates by enclosing material between two or more jaws that come together on contact with the bottom. Also snapper grab, snapper sampler. ΘΚΠ society > occupation and work > equipment > other specific types of equipment > [noun] > equipment for use on seabed creeper?a1400 tangle1882 creep1889 Petersen grab1923 snapper grab1925 sled1939 piston sampler1946 piston core sampler1947 piston corer1954 hydrocast1960 1925 Proc. & Trans. Royal Soc. Canada (Math., etc. Sciences) 3rd Ser. 19 iv. 51 The ‘snapper’ is a simple and inexpensive instrument which has long been used in connection with submarine cable laying. 1942 H. U. Sverdrup et al. Oceans x. 344 Bottom samplers used for oceanographic work fall into three general categories: dredges (drag buckets), snappers, and coring tubes. 1942 H. U. Sverdrup et al. Oceans x. 345 Snapper samplers of the clamshell type have been widely used for obtaining samples of the superficial layers of the sediments. 1968 R. V. Tait Elem. Marine Ecol. iii. 49 For larger samples, various small spring-loaded, snapper grabs have been devised which take a shallow bite out of the sea-floor. < as lemmas |
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