词汇	九级回热
释义	九级回热 nine-stage regeneration
随便看	stepless speed regulation stepless speed regulation lathe stepless speed regulator stepless speed variation stepless speed variator step-less speed variator stepless timing step-less timing stepless transmission stepless transmission gearbox stepless variable steplessvariabledrive stepless variable drive stepless variable radius stepless variable speed stepless variable speed device stepless variation of torque ratio step-less variator stepless voltage regulation stepless voltage regulator step level step library step light step lighting step lighting switch