圆-椭圆截面交叉缩放强化换热管在电站低压加热器中的性能研究
원-타원절면교차축방강화환열관재전참저압가열기중적성능연구
Application of Circular-Elliptic Cross-section Crossing Reducing-Enlarging Intensified Heat Transferring Tube in Low Pressure Heater of Thermal Power Plant
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