Origin of open-hearth
Examples from the Web for open-hearth
Historical Examples of open-hearth
Open-hearth steel is an important manufacture in Birmingham.Commercial Geography
Jacques W. Redway
All these parts are made of the finest quality of open-hearth steel.The Wonder Book of Knowledge
The Corporation altogether has 335 open-hearth furnaces and 38 converters.
All the newer steel plants are equipped with open-hearth furnaces.
They may be either Bessemer, open-hearth, or crucible steel.