实验中将纯钨样品放入HT - 7托卡马克的刮削层中，以研究等离子体与纯钨表面的作用。
In the experiment, samples of pure tungsten were placed in the scrape-off layer of HT-7 tokamak to study the interaction between plasma and the surface of samples.
作用同弹簧式刮削器，但可减少甚至避免刮削管柱落井。
Its function is the same as the spring-type casing scraper, but it can decrease and even avoid that the scraped pipe-column falls in oil well.
作用同弹簧式刮削器，但可减少甚至避免刮削管柱落井。
Its function is the same as the spring-type casing scraper, but it can decrease and even avoid that the scraped pipe-column falls in oil well.
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