ES70441A1 -
A procedure to hermetically close the discharge mechanisms of shaft furnaces and their analogues, which act by compressed air.
- Google Patents
A procedure to hermetically close the discharge mechanisms of shaft furnaces and their analogues, which act by compressed air.
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ES70441A1919-07-221919-07-22
A procedure to hermetically close the discharge mechanisms of shaft furnaces and their analogues, which act by compressed air.
ExpiredES70441A1
(en)