The stress of E-grade steel coupler knuckle was analyzed and the expression of stress intensity factor of the cracks on the coupler knuckle wrist area was given.
对重载列车E级钢钩舌进行了应力分析，导出了钩腕面裂纹的应力强度因子表达式。
2
Pingcha gold deposit is a Sb-Au of rich in sulphide, controlled by the E-W secondary fracture and alteration zone and being small in scal but high in grade.
靖州平茶金矿为多硫化物型锑金矿床，矿化受近东西向次级断裂和蚀变带控制，矿床规模小，但品位高。
3
There are two kinds of pavement for the high grade highways, i. e. bituminous concrete pavement and cement concrete pavement.