Structural steels can be subdivided into constructional steel and machinery steel.结构钢还可分为建筑用钢和机械用钢.A mixture of ferrite cementite forming distinct layers or bands in slowly cooled carbon steels.含%碳的钢(铁碳混合物的低共熔点),含%碳的碳钢是纯...
Every inch of his arms and legs was ulcerated.他四肢全都溃烂了。Very often the infected tongue is enlarged, distorted, nodulated and ulcerated.最常见的是舌感染,舌有肿大, 变形有小结节和溃疡.An infected mucous membrane, especially of the tongue, nose a...