... oil ring bearing 油环轴承 oil ring lubrication 油环滑润 oil sands 含油砂 ...
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Oil and air lubrication casting tools: the machine manufactured precisely with imported materials, the mold cooling stave fit closely with graphite ring, to ensure oil and air sealing effect.
油气滑铸造工装，采用进口材料精密加工，结晶器冷却壁与石墨环紧密贴合，确保油、气密封效果。
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