副室类型Deputy room type:全开门 Full-door炉盖类型Lid Type:斜顶 Inclined top 磁场类型Field type:勾型、水平型(可选)hook type, horizontal type (optional)有导流筒提升、激光测距、CCD控径There draft tube upgrade, laser ranging, CCD control path可提供二次加料providing secondary feed