Achieving the desired resonant frequency of resonators has been an important issue. since it determines their performance. This paper presents the design and analysis of two concepts for the resonant frequency tuning of resonators. The proposed methods are based on the stiffness alteration of the springs by geometrical modification (shaft-widening) or by mechanical restriction (shaft-... https://safeersappliancers.shop/product-category/aeg-steambake-bps552020m-electric-oven-stainless-steel-60cm/