The invention provides a closed type calcium carbide furnace charging nozzle and a process for producing the same.

本发明是一种密闭式电石炉加料嘴及制造工艺。

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The invention provides a closed type calcium carbide furnace charging nozzle and a process for producing the same.

本发明是一种密闭式电石炉加料嘴及制造工艺。

youdao