Sida loo dayactiro tuubada birta alxanka leh ee la isticmaalayo
Guud ahaan, tuubooyinka birta ah ee welded ayaa si ballaaran loo isticmaalaa codsiyo kala duwan maanta. Si kastaba ha ahaatee, waa in aan la kulannaa dhibaatadan oo kale ah in nidaamyada tuubooyinka iyo tuubooyinka ay ku fashilmaan siyaabo dhowr ah, oo ay ka mid yihiin kuwa ugu badan ee la kulmay fashilka, ama fashilka khatarta ah, ...
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