Chowumitsira zovala cha rotary, chomwe chimadziwikanso kuti chovala cha rotary kapena mzere wochapira, ndi chida chofunikira choyanika zovala panja. Imakupatsirani njira yabwino komanso yokopa zachilengedwe yowumitsa zovala, zofunda ndi matawulo. Komabe, monga zida zilizonse zakunja, chowumitsira spin chimafunika ...
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