Investigate the relationship in mechanical alloying method for nanopowder manufacturing method.

Submit the report in $3$ to $4$ pages of A$4$ paper.

The form is

$1.$ Introduction $($Introduction to background and application areas$)$

$2.$ Main body $($description of manufacturing method$)$

$-$Indicate which reference is cited in which part and the number or author name in parentheses.

$3.$ Conclusion $($result$-$oriented, advantages and disadvantages, etc.$)$

$4.$ Opinion $($impressions$)$