Vertex mtundu wa ma coil

Kya othamanga ngati katswiri wopanga makina opanga ma coil ndi othandizira ku China, malo onse a vertex adapereka mfundo zapadziko lonse lapansi, ndipo mutha kukhala otsimikizika moyenera. Ngati simupeza ndalama zomwe muli nazo pamndandanda wathu wazogulitsa zomwe zili patsamba lathu, mutha kulumikizana nafe, titha kupereka ntchito zokonda.