Chowumitsira zovala cha rotary, chomwe chimadziwikanso kuti chovala cha rotary kapena mzere wochapira, ndi chida chofunikira choyanika zovala panja. Imapereka yankho losavuta komanso lothandizira zachilengedwe pakuwumitsa zovala, zofunda ndi matawulo. Komabe, monga zida zilizonse zakunja, chowumitsira spin chimafunika ...
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