tunan.金枪鱼n.霸王树tunable dye laser可调谐染料激光器Tunable frequency频率可调tuna factory ship金枪鱼加工船tunable DFB laser可调分布反馈激光器tunable echo-box可调回波箱, 可调回波谐振器tunable attenuator可调衰减器tunable parameters调试参数tunable capacitors可变电容tuna fish sandwich鱼蓉三明治tunable band-gap可调带隙