Otal-otal, asibitoci, dakunan wanka da ƙwararrun kamfanonin wanki suna fuskantar dubban kayan aiki, mika lilin, wanke-wanke, guga, kammalawa, adanawa da sauran matakai kowace shekara.Yadda ake waƙa da sarrafa kowane yanki na lilin yadda ya kamata Tsarin wanki, adadin wanki, ƙirƙira...
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