没有缩痕、流痕或其他视觉可见的表面缺陷。
No sink mark, flow lines or other visual imperfections to be on visible surfaces.
分析注塑件产生缩痕的原因，并从成型工艺角度出发提出解决缩痕的对策。
This article analyzes the reason of the sink-mark on injection molding product, and raise the solution about this question from view point of molding technology.
探索注塑制品表面产生缩痕的成因及其相关因素，提出了预防性设计思想及补救措施。
The causes and relative factors of the surface shrinkage trace for injected products are discussed, and the design ideas of preventive and remedial measures are presented.
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