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Special pattern was used to weld core iron to guarantee position accuracy of cast holes;
采用专用胎具焊接芯骨以保证铸孔的位置精度；
youdao
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Position accuracy: as per drawing requirements.
位置精度：符合图纸要求。
youdao
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Position accuracy: as per drawing requirements.
位置精度：符合图纸要求。
youdao