芮成钢妻子是谁:琴线是什麼?

琴线(日本标准 G3522)
Piano Wires ( to G3522)
级别，代号，扭曲特性及可用之线材直径
Classes, symbols, twisting characteristic and applied Wire Diameters
直径，公差及拉力强度
Diameter, Tolerance and Tensile Strength
裂纹之容许深度及脱碳层
Permissible depth of flaw and decarburized layer
常用的弹簧不锈钢线-编号，特性，表面处理及化学成份
StainlessSpring Wire – National Standard number, Charateristic, Surface finish & Chemical composition
弹簧不锈钢线，线径及拉力列表
Stainless Spring Steel, Wire diameter and Tensile strength of Spring Wire
处理及表面状况
Finish & Surface
各种不锈钢线在不同处理拉力比较表
Tensile Strength of various kinds of Stainless Steel Wire under Different Finish
圆径及偏圆度之公差
Tolerance of Wire Diameters & Ovality
铬镍不锈钢及抗热钢弹簧线材 –
美国材验学会 ASTM A313 – 1987
Chromium – Nickel Stainless and Heat-resisting Steel Spring Wire – ASTM A313 – 1987
化学成份 Chemical Composition
机械性能 Mechanical Properties
305, 316, 321及347之拉力表
Tensile Strength Requirements for Types 305, 316, 321 and 347
A1S1-302 贰级线材之拉力表
Tensile Strength of A1S1-302 Wire