词汇	bending dumb-bell
释义	bending dumb-bell 要弯管哑铃
随便看	directional drilling traction technology directional drop point directional duality principle directional duration immunization directional dynamics directional earth leakage relay directional earth-leakage relay directional echo sounding directional echo-sounding directional effect directional element directional elements directional emissivity directional emittance directional emitter directional energy gain directional enrollment directional entropy directional error Directional errors directionalet directional etching directional-eutectoid directional evacuation directional exit sig