日期:
来源:雅诚德英语网
The alteration rule of inequilateral Z-type steel thickness in butterfly pass is calculated and analyzed.
计算分析了不等边Z 字钢在蝶式孔型中厚度变化的规律。
The alteration rule of inequilateral Z-type steel thickness in butterfly pass is calculated and analyzed.
计算分析了不等边Z 字钢在蝶式孔型中厚度变化的规律。