YYP135 Falling Dart Impact Tester dị na nsonaazụ nsonaazụ yana nha ike nke dart dara site na otu ịdị elu megide ihe nkiri rọba na mpempe akwụkwọ nwere ọkpụrụkpụ na-erughị 1mm, nke ga-ebute ọdịda ụdị 50% nwalere.
