Dabere na usoro nkedo ịnwụ anwụ, ọtụtụ usoro emeziwanyela, gụnyere usoro nkedo anwụghị nke na-ebelata ntụpọ nkedo ma na-ewepụ porosity. A na-ejikarị ya eme ihe maka nhazi zinc, nke nwere ike ibelata usoro ịgba ọgwụ mgbochi kpọmkwem nke ihe mkpofu iji mụbaa mkpụrụ. Enwekwara teknụzụ nkedo anwụ anwụ ọhụrụ nke General Dynamics chepụtara yana nkedo anwụ siri ike.

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