1Betz. Heavy vehicle radiator with center - mounted hydraulic cooling fan motor and hydraulic motor oil cooler [P]. United States Patent 6179043, January 30, 2001.
2Maruta, et al. Cooling fan drive apparatus [P] . United States Patent 6311488. November 6, 2001.
3Buschur, et al. Hydraulically powered fan system for vehicles [P]. United Slates Patent 6021641. February 8, 2000.
4Garnett, et al. Hydro - mechanical fan drive [P] . United States Patent 6050228. April 18, 2000.
1Robert K.Nichols, P.E.High Frequency Welding Tube[EB/OL]. Http://www.thermatool.com.
2H.N.Udall, R.K.Nichols, P.E. High Frequency Welding of Aluminium[EB/OL]. Http://www.thermatool.com.
3R.K.Nichols,P.E.High Frequency Welding--The Process and Applictions[EB/OL]. Http://www.thermatool.com.
4P.F. Scott. Key Parameters of High Frequency Welding[EB/OL]. Http://www.thermatool.com.
5Katsuyuki Horinouchi. Production Equipment for Thin Welded Pipe and Its Proformance[J].轻金属溶接,1979,17(5).
6古内哲哉.Heat Transfer Characteristics and Manufacturability of High Frequency Welding Tube With Internall W-Grooves[J].Journal of the JRICu ,2002, 41 (1): 119-122.
1Maruta, et al.Cooling fan drive ap- paratus [P]. United States Patent. November, 2001.
2Betz.Heavy vehicle radiator with cen- ter-mounted hydraulic cooling fan mo- tor and hydraulic motor oil cooler[P]. United States Patent. January,2001.
3Buschur, et al.Hydraulically powered fan system for vehicles [P]. United States Patent. February, 2000.
4Gamett, et al. Hydro_mechanical fan drive[P]. United States Patent. April, 2000.
