A method to measure coaxiality of axisymmetric aspheric lens is introduced.介绍了一种轴对称非球面透镜的光轴共轴度的测量方法.A new method of coaxiality measurement of holes of scale mechanical parts is studied.本文提出测量大型机械零部件孔同轴度的新方法.A new coaxial...
Or perhaps your flints are worn out; that does happen sometimes.还有,你们的火石也许用完了, ——这是常有的事.Remarkably few genuine flints exist, considering the vast scope of the story.鉴于故事涉及范围之广,只有极少的“弗林特”存在.Flints were found in associatio...
The bowlers at the eye of the storm were nowhere in evidence.处于风口浪尖的那些投手不见了踪影。Houses had sprung up out of nowhere on the hills.山丘上突然冒出一幢幢的房子。It was nowhere near as painful as David had expected.这远不如戴维所料想的那么痛苦。...