21. Heat pump technology: systems design, installation, and troubleshooting
Author: Langley, Billy C.
Library: Central Library of Sharif University of Technology (Tehran)
Subject: ، Heat pumps
Classification :
TJ
262
.
L36
1989
22. Heating,Ventilating, air conditioning and refrigeration
Author: / Billy C.langley
Library: Central library of Faculty of Agricultural Technology (Aburaihan) (Tehran)
Subject: Refrigeration and refrigerating machinery,Air conditioning,Ventilation
Classification :
TP492
L354
1990
23. Heating,Ventilating, air conditioning and refrigeration
Author: / Billy C.langley
Library: Central library of Faculty of Agricultural Technology (Aburaihan) (Tehran)
Subject: Refrigeration and refrigerating machinery,Air conditioning,Ventilation
Classification :
TP492
L354
1990
24. Heating systems troubleshooting handbook
Author: Langley, Billy C.
Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)
Subject: Heating - Equipment and supplies - Maintenance and repair
Classification :
TH
7225
.
L36
1988
25. Heating, ventilating, air conditioning, and refrigeration
Author: Langley, Billy C., 1391-
Library: Library of Niroo Research Institue (Tehran)
Subject: ، Refrigeration and refrigerating machinery,، Air conditioning
Classification :
TP
492
.
L354
1990
26. Heating, ventilating, air conditioning, and refrigeration
Author: / Billy C. Langley,Langley
Library: Central Library and Documents Center of Tehran University (Tehran)
Subject: Refrigeration and refrigerating machinery,Air conditioning
Classification :
TP
492
.
L354
1990
27. Heating, ventillating, air conditioning, and refrigeration
Author: / Billy C. Langley
Library: Tehran University, technical faculty libraries 1 (Tehran)
Subject: Refrigeration and refrigerating machinery,Air conditioning
Classification :
TP
492
.
L354
1990
28. High- efficiency gas furnace troubleshooting handbook
Author: Langley, Billy C., 1391-
Library: Library of Niroo Research Institue (Tehran)
Subject: ، Furnaces- Maintenance and repair,، Air conditioning- Equipment and supplies- Maintenance and repair,، Refrigeration and refrigerating machinery- Maintenance and repair,، Gas appliances
Classification :
TH
7623
.
L36
1991
29. Plant maintenance
Author: LANGLEY,BILLY C
Library: Central Library of Amirkabir University of Technology (Tehran)
Subject: PLANT MAINTENANCE
Classification :
TS
192
.
L36
30. #Plant maintenance
Author: #Billy C. Langley
Library: Central Library of Esfehan University of Technology (Esfahan)
Subject: Plant maintenance
Classification :
#
TS
،#.
L36
،#
1986
