一支笔背后，藏着怎样的注塑功夫？
一支笔，落在纸上，是流畅的线条；进入车间，则是一道道具体的制造课题。 从储墨器的稳定成型，到多腔笔杆的高效量产，日常书写工具的背后，有着对注塑精度、塑化效果与生产节拍的细致考量。...
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