Menene bawul ɗin duniya?Ƙungiyoyin buɗewa da rufewa na bawul ɗin duniya suna da nau'in fulogi mai siffar fulogi, filin rufewa yana da lebur ko conical, kuma diski yana motsawa a madaidaiciyar layi tare da tsakiyar layin ruwa.Sigar motsi mai tushe, akwai nau'in sandar ɗagawa (ɗagawa mai tushe, ƙafar hannu ba liftin ...
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