Iskaashatada is-daloolinta, bilaha is-taajinta, boolasha madaxa ee badhanka, iyo birta madaxa ee Phillips truss waa dhammaan qaybaha muhiimka ah ee caawinaya inay isku hayaan biraha xaashida ah, looxyada wax lagu arko, iyo walxaha kaleba.Nalalka isku dhejinta waxay badanaa ka samaysan yihiin bir leh dusha sare ee galvanized iyo maraq.Rakibaadahan degdega ah...
Akhri wax dheeraad ah