... to hawking high frequency,high efficiency and energy under focus.at the same time,the hawking vibration wave change the ... ,strutures,plate thicknesss,weight,place,especially easy to use at the construction site, to eliminate the welding stress while ... protection,energy saving,safety, and very easy to use at the construction sites. ItemJT2050JT4050JT4030Rated frequency(KHz)204040Max output amplitude(μ ...