它的喷嘴抹了某种润滑油。Its nozzle was smeared with some kind of lubricant.将火柴放在煤气喷嘴上点燃煤气.Put a match to the jet to light the gas.她掉转喷嘴,让水花集中喷入小河.She turned the nozzle and the spray concentrated down to a stream....
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...