“发现”号航天飞机的宇航员们完成了他们任务清单上的另一项任务——第二次太空行走。
Astronauts aboard the space shuttle Discovery can cross another item off their "to-do" list: a second spacewalk.
介绍了最近开发成功并应用的三项厚板坯连铸新技术 ：人为鼓肚轻压下 ，二次喷淋新技术及在线快速调厚调宽的零号扇形段。
The three new are as follows, international bulging and soft reduction, new spray technology in secondary cooling and on line quick width adjustable and thickness adjustable device for zero segment.
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