3Barth R E,Bonorden C M,House P A,et al.Heat tracing technology for the 21st century.IEEE Industry Applications Magazine,2002,8 (1):42~48
4Pitzer R K,Barth R E,Bonorden C.Steam tracing-new technologies for the 21 st century.Energy Engineering:Journal of the Association of Energy Engineering,2000,97(2):21 ~42