positive inverted structure
positive inverted structure
正倒置结构
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Furthermore, the backboard die structure and forming technology principle of forming by combining positive and inverted directions are stated in emphasis.
并对正向与反向混合成形的后板模具结构、成形工艺原理给予重点阐述。
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