bolt hole cold-working strenthening的意思|示意
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英 / /
螺栓孔冷加工强化
bolt hole cold-working strenthening的网络常见释义
螺栓孔加强 ... 螺栓孔削角；螺栓孔倒棱 bolt hole chamfering 螺栓孔加强 bolt hole cold-working strenthening 轨头水平劈裂 horizontal split of rail head ...