Ikirangantego cyo mu maso DF
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Imashini ya kashe ya DF izwi kandi nka Biconical Seals
Ikidodo cyanyuma cyangwa imashini ziremereye zashizweho kugirango zizunguruke zikoreshwa ahantu habi cyane aho zishobora kwihanganira kwambara cyane kandi bikabuza kwinjira mubitangazamakuru byo hanze.Ikirangantego cyanyuma kizwi nkikimenyetso kiremereye cyane, kashe yanyuma, kashe ireremba, kashe yubuzima, kashe ya Toric, hamwe na kashe nyinshi.
