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API 5L X65 VS X70 Roj thiab roj xa cov yeeb nkab

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API 5L X52 thiab API 5L GRB yog cov qib sib txawv ntawm tib tus qauv specification. X52 yog qib siab dua GRB. Ob qib sib txawv ntawm kev ua tau zoo th

api 5l x52 vs a333 cev