... 初加料，起熔料：initial charge 初次缩孔：primary pipe 初次锍：first matte ...
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初次模拟显示，在阶梯轴的凸台处与其临近连接的阶梯轴段会产生缩孔、缩松缺陷。
The initial simulation indicated that the shrinkage defects formed at the boss sections and the section near the connection of multi-diameter shaft.
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