Theoretically, all of the fuctions of the electric tubes can be substituted by those of semi-conductor and the objective technical specifications of the circuts of semi-conductor are far more better than that of the electric tubes.

• 理论上说，电子管的全部功能都可以被晶体管替代,而且，晶体管电路的客观技术规格比电子管的也优异得多了。