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PZµx Y µ y\r?..... ?1\r120=12000 8 0 =8000\rx? 12000=1:4000 ?1 ??.\rx=3 ..........?1\ry? 8000=1:4000 ................ · ?1\ry =2 .........................?1\r3X2=6 ?P?............... ..?1\r?$
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