包有塑料膜的化肥日本的一家公司研究成功一种“长寿”化肥,这种化肥的每个小颗粒外面,都包有一层特殊的塑料薄膜。这种化肥撒在田间以后,塑料薄膜会慢慢地破裂,一点一点地放出肥料,在五年内均能发挥肥效,从而大大节省了向农田撒化肥的工时费用和因日晒雨淋使化肥失效的问题。一分钟能砍倒大树的伐树机加拿大发明了一种能在一分钟内把大树砍倒,剪去枝叉,并能把树干裁成一段一段的自动化伐树机。它的外形象一把大剪 Fertilizer coated plastic film A Japanese company successfully researches a “longevity” chemical fertilizer that contains a layer of special plastic film on the outside of each small particle. After the fertilizer is sprinkled in the field, the plastic film will slowly rupture, releasing the fertilizer bit by bit and exerting fertilizer efficiency within five years, thereby greatly saving the man-hour cost of spreading chemical fertilizers on the farmland, Fertilizer failure problem. Tree-cutting machines that cut trees for one minute Canada invented an automated tree-cutting machine that cut trees, cut branches and cut the trunk in segments in less than a minute. It looks like a big cut