Calculation of development size of pressing with special incline is not discussed in many press technology books and die design manuals, and it is a difficult problem in real working.
具有特殊斜面的冲压件展开尺寸计算在众多的冲压工艺书籍和模具设计手册中鲜有论述，在实际工作中是个难题。
From the perspective of technology, lots of different books expound some ships' shape and special feature of each period.
不同版本研究船史的论著，从技术的角度系统、全面的论述了我国古代各个时期出现的一些船型及其特点。
From the perspective of technology, lots of different books expound some ships' shape and special feature of each period.
不同版本研究船史的论著，从技术的角度系统、全面的论述了我国古代各个时期出现的一些船型及其特点。
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