He fixed the towing cradle round the hull.他把牵引支架固定在船体上。a car towing a trailer with a boat on it拖着一辆载有小船的拖车的小汽车The tug is towing three barges.那只拖船正拖着三只驳船....
建立了砂轮的球基渐开螺旋面方程和分度球面螺旋线方程,给出螺旋运动参数、螺旋线导程.The mechanism of grinding internal gear of spherical worm emery - wheel is researched.正圆锥螺旋面是正圆柱螺旋面被同轴正圆锥面截得.The ortho cone helicoid was used interrsect intercept by the ortho con...
Young players have got to be the way forward for every club.培养年轻球员应该是所有俱乐部谋求发展之道。I have got to meet my partner every Friday.每周五我必须和我的合伙人碰头.We have got to get the message over to the young that smoking isn't cool.我们要...
Don't know headphone is the best one for using ipod.我用这套算是随身听究级完美了.What is Dolby Headphone Technology?什么是杜比耳机?Length of the headphone cable are free to control.耳机线的长度可以随意控制.We are Chinese professional manufacturer f...