The vascular bundles in stereid layer or Parechymatous cell layer of lateral margin of its testa provide the testa development with water and nutrition.
合欢种皮侧缘厚壁(薄壁)细胞层中有维管束，它为种皮的发育提供水分与营养。
2
A layer composed of the particle-size composition of characters and symbols is spread on the external surface of the upper margin, used as identified markers.
一层组成的颗粒粒度组成的字符和符号传播，对外部表面的上缘，用来作为识别标记。
3
Tarim's Hade thin - sand reservoir which is named margin reservoir is a double - layer, super - deep, super - thin, super - low - abundance reservoir.