It has been introduced that cracking defect of female die cushion of forging machine has been analysed and its preventive heat treatment technology.
介绍了锻压机垫板的热处理工艺改进措施，从而防止了其开裂缺陷，提高了使用寿命。
2
The variety of walnut was classified according to related information. It' s necessary to crack soft walnut by machine. Cracking principle was put forward.
本文首先根据有关资料对核桃品种进行了分类，指出绵核桃机械剥壳取仁的必要性和重要性。
3
On the basis of the principles and structures of the cold cracking implant testing machine, the study on the implant equipment of reheat cracking test is reviewed in this paper.