介绍了通过自制的喷嘴系统，向抬包底部喷吹氧气精炼工业硅的生产实践。
The practice is introduced for refining industrial grade silicon by oxygen injection to the bottom of two-man ladle through self-makings pray nozzle system.
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他刚才抬一个重包的时候扭伤了右臂。
He strained his right arm by lifting a heavy bag just now.
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模块上移
模块下移
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