Domin ASTM misali, daban-daban abu tare da daban-daban karfe sa, ban da, su inji Properties da sinadaran abun da ke ciki, metallurgical Properties ne duk daban-daban. Akwai jerin ma'aunin asm tare da nau'in karfe daban-daban. ASTM A53 / A53M Ƙimar Ƙididdiga don Bututu, Karfe, Bla ...
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