Igwe a dabara adaba maka imepụta taịlị ụlọ dị mkpa nke nwere ọkpụrụkpụ nke 0.14-0.4mm na obosara nke ihe na-erughị 1000mm.
Igwe na-emepụta mpempe akwụkwọ ntụgharị dị mkpa
1. Igwe a na-adabara maka mmepụta nke ihe mkpuchi ụlọ dị mkpa nke nwere oke nke 0.14-0.4mm na obosara nke ihe na-erughị 1000mm.
2. Enwere ike ịmepụta ọtụtụ mpempe akwụkwọ n'otu oge ahụ, ngụkọta ọkpụrụkpụ n'otu oge adịghị agafe 0.6mm