The second feature is it can create guiding force with three rotational guiding gears to change the gravity force and inertia force to the force to cut the bulges on the wall,and help the...

 
  • 在裝置最下部增加了三個(gè)導向自轉牙輪,能夠產(chǎn)生導向力并可將重力和慣性力轉化為對井壁凸起部分的刮削作用。該裝置進(jìn)行了現場(chǎng)實(shí)驗,達到了預期效果。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan