open-center system
... on-line emitter 外置式喷头（滴头） open-center system 开心树形 opral decision （坐蓐过程）操作决策，具体环节决策 ...
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高干开心树形 the High Stem and Open Center Shape
·2,447,543篇论文数据，部分数据来源于NoteExpress
不同树形叶片净光合速率比较，开心形高于纺锤形，纺锤形高于对照。
Compared net photosynthetic rate in different tree frame, the open was higher than the spindle; the spindle was higher than the control.
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