Castors kalma ce ta gaba ɗaya, gami da siminti masu motsi, ƙayyadaddun siminti da simintin motsi tare da birki. Siminti masu motsi, wanda kuma aka sani da ƙafafun duniya, suna ba da damar juzu'i 360; Kafaffen simintin gyaran kafa kuma ana kiransa simintin kwatance. Ba su da tsarin juyawa kuma ...
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