作为传热技术改进的若干内衬管的性能评价的英文

performance evaluation of some tube inserts as heat transfer enhancement techniques

• 作为:    conduct; deed; act ...
• 传热:    conduct heat
• 技术:    technology; skill; ...
• 改进:    improve; make bett ...
• 的:    4次方是 The fourth po ...
• 若干:    a certain number o ...
• 内:    inner; inside; wit ...
• 衬:    line; place sth. u ...
• 管:    pipe; tube
• 性能:    function; performa ...
• 评价:    appraise; evaluate ...