Injini, injini ndi makina omwe amatha kusintha mphamvu zina kukhala mphamvu zamakina, kuphatikizapo injini zoyatsira mkati (ma injini a petulo, etc.), injini zoyatsira kunja (Injini za Stirling, injini za nthunzi, etc.), ma motors magetsi, etc. , injini kuyaka mkati nthawi zambiri con...
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