Practice proves that the measures are effective to guarantee the quality of hot shell nosing parts.
实践证明，这些措施对保证和提高拉杆热收口质量是有效的。
The hot forming process of cannonball body semiproduct is mainly composed of four operations: pressing, punching, ironing, and shell nosing.
炮弹弹体毛坯热精密成形过程主要由压型、冲孔、引伸和收口四道工序组成。
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