短语词组短語shaft electrical arc furnace 竪爐;竪式電爐shaft electric arc furnace 竪爐電弧爐AC shaft Arc furnace 交流竪式電弧爐finger shaft arc furnace 竪式電弧爐shaft -electric arc furnace 竪爐電弧爐t finger shaft arc furnace t 竪式電弧爐 返回 shaft arc furnace