从而可实现采用小吨位设备，制造出加工余量少的变截面带双法兰钢半球壳锻件。
This new method made it true to use light tonnage equipment to forge the half spherical steel shell with small metal allowance and variable sections.
本发明制备方法简单、所需设备 吨位小、脱模时间短、对模具没有严格要求及成本低廉。
The preparation method is simple, has small equipment tonnage required, short demoulding time and low cost, and has no strict requirement on the die.
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