FIELD: electrical engineering. SUBSTANCE: inducing winding and steel shell of heater are built up of several wound shells connected in series and inducing winding in each shell in single-row winding on external surface of inner tube in the form of coils with definite proportion of their dimensions. EFFECT: improved heat transfer and reduced manufacturing cost. 3 dwg
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Authors
Dates
1995-06-09—Published
1992-09-28—Filed