Cov saw hlau uas tshem tau
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Cov Hlau Uas Tshem Tau, hom 25, 32, 32W, 42, 51, 55, 62
Cov saw hlau uas tshem tau (SDC) tau siv rau hauv kev ua liaj ua teb thiab kev lag luam thoob plaws ntiaj teb. Lawv tau los ntawm thawj qhov kev tsim cov saw hlau uas tshem tau thiab raug tsim los kom sib dua, pheej yig, thiab ruaj khov.