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structureofwood木材结构lumber木材crosssection横切面bark树皮pith髓心sapwood边材heartwood心材annualgrowthring年轮earlywood早材latewood晚材fiber纤维tracheid管胞vessel导管pore管孔hardwood硬材softwood软材woodray木射线cellulose纤维素hemicelluloses半纤维素lignin木质素extractive提取物physicalproperitesofwood木材的物理性能moisturecontent含水率orthotropic正交的anisotropic各自异性的hygroscopicity吸湿性longitudinal纵向的radial径向的tangential弦向的boundwater结合水freewater自由水cellwall细胞壁cellcavity细胞腔fibersaturationpoint纤维饱和点EMC＝equilibriummositurecontent平衡含水率dimensinalstability尺寸稳定性shrink收缩swell膨胀split开裂check裂纹warp弯曲adhesive胶粘剂stiffness刚度，韧性interphase中间相，界面adherens被粘物adhesion胶合interfacial两表面间的interlocking连锁，互锁synthetic合成的formulation配方，组成thermoplastic热塑性的thermosetting热固性的polyvinylacetate聚乙酸乙烯酯phenolic苯酚的shelf-life储存期spreading涂胶量filler填料extender填充剂exterior室外的interior室内的phenol-formaldehyde酚醛树脂resorcinol-formaldehyde间苯二酚树脂phenol-resorcinol-formaldehyde苯酚-间苯二酚-甲醛melamine-formaldehyde三聚氰胺甲醛melamine-urea-formaldehyde三聚氰胺脲醛树脂isocyanate异氰酸酯epoxy环氧树脂urea-formaldehyde脲醛dry-bulbthermometer干球温度计wet-bulbthermometer湿球温度计timeschedule时间基准RH=relativehumidity相对湿度kilndry窑干drykiln干燥窑airdry气干dryingschedules干燥基准moisturecontentschedules含水率基准dryingdefect干燥缺陷tensilestress拉伸压力compressionstress压缩压力elasticlimit弹性极限permanentset永久变形maximumstrength最大强度tissure裂痕distortion扭曲endsplit端部开裂corrugation皱缩sapstain边材变色discolour变色