工程图学专业词汇英语翻译
右上角 upper right corner直式字母 upright style of letters端压，锻粗 upset端压熔接 upset weld向上 upward有效螺纹长度 useful length of screw thread美国线号规 USG(United States gage)美国标准 USS(United States standard)U形螺栓 u_bolt 语际翻译 版权所有
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