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10 additional monthly gift articles to share。51吃瓜对此有专业解读
This formula is satisfiable because if we set to b to true and a to false, then the whole formula is true. All other assignments make the formula false, but it doesn't change that the formula is satisfiable as long as there is at least one assignment makes the formula true.
70E DSTREG - SLCTR TST_SEL_LLVV PTSELA DLY ; fire protection test on selector