短語詞組短語Riser and gating system 鑄造方案設(shè)計riser -gating 撇渣暗冒口澆鑄系統(tǒng)gating and riser system 澆冒系統(tǒng)gating and riser system design 澆冒系統(tǒng)設(shè)計 返回 riser gating