| 单词 | knapsack sprayer |
| 释义 | > as lemmasknapsack sprayer knapsack sprayer n. (or knapsack spray) a sprayer consisting of a hand-held nozzle supplied from a pressurized reservoir that is carried on the back like a knapsack. ΘΚΠ the world > food and drink > farming > tools and implements > [noun] > irrigation devices acequia madre1835 trunk1856 irrigation-wheel1864 lawn-sprinklera1884 levada1885 knapsack sprayer1897 lawn-sprayer1943 society > occupation and work > equipment > pump > [noun] > other types of pump bottom lift1778 rose pump1778 centrifugal pump1789 jack-heada1792 jet pump1850 sand-pump1865 Union pump1867 shell-pump1875 eductor1877 brake-pump1881 bull-pump1881 cam-pumpa1884 sand-reel1883 grasshopper1884 knapsack pump1894 knapsack sprayer1897 turbo-pump1903 Sylphon1906 slush pump1913 displacement pump1924 power pack1937 proportioner1945 solids pump1957 peristaltic pump1958 powerhead1981 Cornish pump- 1897 Sears, Roebuck Catal. No. 104. 162/3 The Celebrated Myers Knapsack Spray Pump. 1909 Cent. Dict. Suppl. at Sprayer Knapsack sprayer. 1950 N.Z. Jrnl. Agric. Feb. 177/2 Obtaining complete coverage of tall [orchard] trees with a knapsack sprayer is most difficult. 1971 Community (E. Afr. Community) Apr. 8/1 The new method could well replace the present widespread use of knapsack sprayers which was considered inefficient in insecticide application. < as lemmas |
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