波距 meaning in English

pitch of waves

In practice , changing the belt wavelength , comparing the heat transfer performance of the single row tube and single wave belt with the single row tube and double waves belt , double row tubes and double waves belt , three row tubes and single wave belt , i draw a conclusion that the single row tube and double waves belt is the best
在实践上，通过改变翅片波距w ，比较单排单波带、单排双波带、双排双波带及三排单波带散热器的传热性能，得到单排双波带传热效果最佳的结论。