单词 |
sticky shield |
释义 |
Sticky shield Sticky shieldA panel covered with a sticky layer (much like present day flypaper) used to trap insects. Such shields were sometimes made of canvas in the form of a large open-bottomed-and-ended box that was mounted on wheels and dragged (by horse or mule) over a row of plants. One formulation of the sticky layer was paint made by boiling five pounds of rosin in a half gallon of castor oil. It was then applied hot to the canvas. |
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