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Tỷ lệ kèo nhà cái¬ͳʾйΪҽҵ˴˽ֺ֧ͰҪһֱ߶ʹΪƽжϵҪԴ˱ʾл
ƣפʦԶеıҪͨϾʩԱжṩߴ15-20Ԫĸ߶֧ۿĸ43ijֵ¼СҶȦƽΪôѷ͵ֶijϺʿȷʵСִеרҵ֪ʶȷʵҪȡƴҪۻȼǻѧҩƷһЩ߱רҵ֪ʶԱȻôͳġˮ˻û÷Σ
ְûиȷ涨ùλýְĴλͥλְԱסӦʱ˲ְ
ݹͬ籨վΪʵֳ˻ܺƶԻ̸ȡóɹһڰȫ˻̶ⳤ̣2+2̣ôԤƽڶ˹÷ΪķͷѺźϵĿǰԶܴﵽƱij̶˺洢ҲӭԼĵһ̨̻ͬASML193nmʽڲ20-14nmյ3DNAND澧Բ7200Ԫһ̨