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In order to tamp the pit as much as possible, the main reason is to brush the dust with a knife as hard as possible.

 

Scraping atomic ash for the second time

 

In the case of scraping atomic ash for the second time, although it is also to better fill the pit, there is no need to press it with all strength at the moment. It should be longer as far as possible during scraping, so as to reduce the gap between atomic ash and the pit.

 

Scraping atomic ash for the third time

 

In the case of scraping atomic ash for the third time, there is no doubt that it is to better scrape the pores left by the previous brushing, so as to make the whole surface smooth. Then, in the case of brushing, it is necessary not only to manipulate a certain range, but also to carefully observe whether there are pores on the surface.