词汇	clean tunnel
释义	clean tunnel 洁净隧道
随便看	deflection of septum deflection of sound deflection of spring deflection of subgrade deflection of tax liability deflection of teleconnection route deflection of the needle deflection of the plumbline deflection of the plumb line deflection of the vent-pipe deflection of the vertical deflection of the vertical correction deflection of vertical deflection of working fluid deflection of zero-position deflection oscillator deflection oscillatorscanning generator deflection parameter deflection pass deflection pattern deflection period deflection ph-meter deflection picture tube deflection plane deflection plate