Wannan labarin yana nufin masu siye da masu rarraba kayan aikin injiniya don kwatanta ainihin tasirin nau'ikan nau'ikan fitilu uku na aluminum / filastik / karfe dangane da yanayin zafi, juriya na lalata, ƙasa da aminci, juriya mai tasiri da juriya na UV, nauyi da shigarwa da kiyayewa, da daidaiton tsari na masana'anta., Kuma yana ba da ra'ayoyin zaɓin kayan don fitilun panel da fitilu a ƙarƙashin bambance-bambancen ƙarfin ƙarfi.