1950年美国大湖炭素公司首先发明了石油系针状焦。

Petroleum-based needle coke was first invented by American Great Lake Carbon Corporation in 1950.

youdao

1950年美国大湖炭素公司首先发明了石油系针状焦。

Petroleum-based needle coke was first invented by American Great Lake Carbon Corporation in 1950.

youdao