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| 结晶器非正弦振动 (【技】其振动特点是结晶器上振速度慢，上升时间长，下降速度快，下降时间短。优点是：铸坯坯壳振痕浅、表面质量好、负滑脱量大有利于拉裂坯壳的焊合、润滑效果好减小了结晶器与铸坯壳间的摩擦阻力。) | |||
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nonsinusoidal mold oscillation : 2 phrases in 1 subject |
| Metallurgy | 2 |
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