黑松年轮宽度 晚材率

本数据记录了黑松中年轮宽度 晚材率的序号、记录本序号、试样序号、整年轮边界距离、一公分内年轮数、整年轮边界距离内年轮总数、晚材之总量、晚材率、年轮宽度等记录。木材物理力学的各项测定指标，直接反映此种木材的强度等特性，为木材利用和木结构的规范等提供科学数据。本数据库包括物理力学数据和其试验方法（请参看附件1中华人民共和国国家标准GB1927～1943-91《木材物理力学性质试验方法》，附件2木材物理力学各个项目的定义）。

This dataset records the serial numbers of annual ring width and latewood percentage in Pinus thunbergii (black pine), as well as the record book serial number, specimen serial number, total distance between annual ring boundaries, number of annual rings per centimeter, total number of annual rings within the specified boundary distance, total latewood volume, latewood percentage, and annual ring width. Various measured indicators of wood physical and mechanical properties directly reflect the strength and other characteristics of this wood species, providing scientific data for wood utilization and the development of wood structural codes. This database includes physical and mechanical property data and the corresponding test methods (please refer to Annex 1: Chinese National Standard GB1927～1943-91 *Test Methods for Physical and Mechanical Properties of Wood*, and Annex 2: Definitions of Various Items Related to Wood Physical and Mechanical Properties).