Tsarin firam
Ana daidaita firam daga foda mai rufi oval mai rufi. Foda shafi shine Chip-resistant, yana ba da ƙarfi, ko da launi da kariya da tsari tsatsa. Zabi injunan karfin da aka tsara don masu amfani gida, suna bincika inganci ko kayan aiki, kowane yanki na motsa jiki a cikin sansanonin soja, otal, aurenan wasannin.