About HUANG J
About Jinshu Rechuli
About shearing machine
About wool
About metal structure(microstructure)
About tool edge
About cutting part
About cutlery steel
About carbide
About crystal grain size
About particle size distribution
About hardness
About tool life
About martensite
About nitriding
About hardening(heat treatment)
About はさみ
About Surface hardening
About Textile industry in general
About 羊毛
About せん断機
About 刃
About 金属組織
About 模様