high-grade carbon steel
... 高级碳化无烟煤 ta-anthracite; 高级碳素钢 high-grade carbon steel; 高级（飞行）特技 acrobacy; ...
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... high-gradebeeftallow高级牛脂 high-gradecarbonsteel高级碳素钢 high-gradecastiron高级铸铁 ...
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高级优质碳素钢 high-grade fine carbon steel
钢管材质选用碳素钢，活塞杆选用碳钢，油封采用进口高级精制品，耐油，耐磨，耐压，耐腐蚀。
Steel material selection of carbon steel, carbon steel, piston oil imported advanced masterwork, oil resistance, wear-resisting, compression, corrosion resistance.
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