Anyị nwere ike ịmepụta ngwaahịa dịka ọkọlọtọ dị ka EN877 / DIN19522 / ISO6594 ASTM A888 / CISPI 301, CSA B70, BS4622, ISO2531, EN545, EN598.

Anyị nwere ike ịmepụta ngwaahịa dịka ọkọlọtọ dị ka EN877 / DIN19522 / ISO6594 ASTM A888 / CISPI 301, CSA B70, BS4622, ISO2531, EN545, EN598.Anyị nwere olile anya na anyị nwere ike ịmalite imekọ ihe ọnụ na ndị mmekọ gburugburu ụwa.