单词 | pulling jack |
释义 | > as lemmaspulling jack pulling jack n. a hydraulic device designed to lift or pull heavy weights. ΚΠ 1875 E. H. Knight Amer. Mech. Dict. III. 1820/2 Pulling-jack, a hydraulic device for lifting or pulling heavy weights. 1998 Tunnels & Tunnelling Internat. (Nexis) Mar. 50 There is an exploratory probe and three pulling jacks with a tensile force of 500kN each. < as lemmas |
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