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...
Treatment, though - whether it's chemotherapy or immunotherapy - will tilt the odds in her favour.不过,治疗一下 -- 不管是化学疗法还是免疫疗法 -- 总会使情况对她有利.Extravasation of antineoplastic agents is one of the most common complications ...
The tug is towing three barges.那只拖船正拖着三只驳船....barges, with their sails ruddy brown from regular dressing of ochre.船帆由于经常涂染赭石变成了淡红棕色的游艇Heavy goods could be brought up-river in barges.较重的货物可用驳船运到上游。The seagulls swirled in ...