收缩线
Due to the special structure and strict technical requirements of the front shock absorber sleeve of motorcycle, which leads to casting defects, such as shrinkage porosity, surface blowhole, are very easy to occur in production.
铝合金摩托车液压式前减震器筒体特殊的结构、严格的技术要求,导致生产中铸件很容易出现缩松、皮下气孔等缺陷。
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