Qhov teeb meem yuav yog tias koj cov saw yog dav heev. Txhawm rau nruj nws, txoj saw yog feem ntau 25--30cm. Nws yuav tsum khaws cia ntawm qhov loj me no thiab muaj roj ntawm 500km los ua kom cov saw ntub.
Lub nra hauv lub iav qis yog nce, thiab qhov nyhav ntawm cov saw yog hnyav.
Yog tias koj tsis tuaj yeem kho cov saw hlau, ces saib ntawm qhov ntsuas ntawm qhov ntsuas me me kom pom tias cov hniav ntawm sprocket hnav tawm, koj yuav tsum hloov lub sprocket.
