The contents of metal ions in sapwood are higher than those in heart wood.
结果发现在实验范围内，各种木材原料中都存在由多种金属离子构成的复杂体系；不同种原料中金属离子的含量和成分存在着很大差异；针叶木Ｆｅ、Ｍｎ 含量显著，高于阔叶木；同种原料中，边材金属离子含量一般高于心材；不同生长环境会导致木材金属离子分布出现差异。
The transformation of sapwood to heartwood is an important physiological process in most tree species.
以东北东部山区温带森林的7个主要组成树种——红松、兴安落叶松、春榆、水曲柳、胡桃楸、黄菠萝和蒙古栎为研究对象,比较分析各树种心材和边材的生长特征。
Experimental results showed that the sap flux density(SFD) of the middle sapwood was higher than the outer and inner;the daily SFDs of different sizes of trees diameter had similar pattern,the bigger trees had higher SFD than the smaller trees due to the difference in size of root system;the mean daily.
结果表明:加勒比松边材不同位点的液流密度由外到内呈低—高—低的态势;观测期间林分日液流密度变幅为411~4 120 L。
Thecolor of sapwood of Chinese white poplar among trees has significant difference.
毛白杨边材材色株间存在显著差异。
Effects of Provenances on Growth Characteristics of Sapwood and Heartwood of Larix gmelinii Trees
兴安落叶松边材心材生长特征的种源效应
The wood varies in colour from a flesh shade to a light reddish-brown with little distinction between heartwood and sapwood.
木材颜色从肉色到淡红褐色不等，边材和心材区别很小。
One or more layers of living and functional sapwood cells are periodically converted to heartwood.
每个生长周期都有一或多层活的边材细胞转变成心材。
Sapwood contains xylem vessels, but not as strong as heartwood.
边材含有木质导管，但不如中心木质那样坚硬。
mount of textile materials for fans
风扇边饰,纺织材料制
Piles of lumber were stacked along the road.
大量的木材堆放在路边。
CALCULATION ON HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH HEXAGON HOLES
带有六边形孔的复合材料板之孔边应力计算
A piece of material sewn to the edge of a garment, such as a dress or coat, as lining or decoration.
贴边，镶边作为陪衬或装饰缝在衣服，如裙子或大衣边上的一块材料
"Facing:a piece of material sewn to the edge of a garment, such as a dress or coat, as lining or decoration."
"贴边,镶边:作为陪衬或装饰缝在衣服,如裙子或大衣边上的一块材料."
line near the edge with a different material, as of a garment.
用不同的材料在衣服上加边。
To sand flat edges or complex profiles, whether solid veneer or substrate material.
砂光平面边部或剖面，实木单板或基材。
Localize and/ or edit collateral materials related to games.
汉化或编辑与游戏相关的周边资料、材。
Boundary friction is independent of the guide material used.
边界摩擦与导纱杆材料质地无关。
Numerical Analysis of Edge Effect in Laminated Composite Structures
层状复合材料结构边缘效应数值分析
Treatment for Crack and Material Discontinuity with Natural Element Method
自然单元法计算裂纹与材料边界问题
Studies on pulping performance for poplar leftover bits and pieces with mulberry branch
杨木边角材-桑枝混合制浆性能探索
Stress distribution near the opening and stress concentration for composite laminates with a circular opening
含孔复合材料层合板孔边的应力集中