美国标准螺纹
AST
American standard screw thread
American National screw thread
american standard thread
Standard thread
US Standard thread
american nation thread
美国标准螺纹配合等级
American screwthread class
英国标准管螺纹
british standard pipe thread
英国标准管螺纹英国的
british standard pipe thread
光学字符符识别-美国标准协会标准
optical character recognition-ANSI standard
美国FORTRAN标准协会
FORTRAN American standards association
美国标准
As
United States standard
USS
American standard
Classification of remote sensing image
USA standard
USS United States Standard