heading techinque
... heading press顶锻压力机 heading techinque顶锻工艺 headway前进、进展、（顶部）净空、（前后两车之间的）车间时距、时间间隔 ...
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提高焊缝性能应当从温度场分布和顶锻工艺着手。
The performance of the weld would be improved with the regulation of the temperature field distribution and the upsetting parameters.
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