In the non-stomata areas the epidermal cells are oblong and parallel to the long axis of leaves, and the anticlinal walls of epidermal cells are mostly straight or some-times undulate.
非气孔分布区内，表皮细胞长方形，细胞壁直或稍微呈波状，细胞长轴与叶片长轴一致。
In accordance with the difficult problems of grinding non-axisymmetric aspheric surfaces with 5-axis CNC machining and mould grinding, a new parallel grinding method is put forward.
针对非轴对称非球面的成形加工法柔性不足及球形砂轮加工法对工具和机械的要求太高的缺点，提出采用普通圆弧金刚石砂轮加工的平行磨削法。
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