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随着晶体管和集成电路的出现,近十五年来,软支承平衡机向硬支承平衡机的一个普通的过渡,这从经济角度来看是切实可行的,因为硬支承平衡机比以前广泛使用的软支承平衡机对不平衡信号的放大和滤波要求更高。
With the advent of transistors and integrated circuits, a common transition from soft-bearing balancers to hard-bearing balancers over the last fifteen years is economically viable because hard-bearing balancing machines are more widely used than ever Soft support balancer unbalanced signal amplification and filtering requirements are higher.