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建議你重新溫習(xí)一下大學(xué)里的基礎(chǔ)課程。類似筆套這樣多次拉伸的產(chǎn)品,由于在拉伸的過程中材料產(chǎn)生加工硬化的現(xiàn)象,所以必須對(duì)材料進(jìn)行必要的處理。
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