了解三氯 乙醛 的毒性和致突变作用.Acute toxicity test , mutation test and single - cell gel electrophoresis ( SCGE ) were used.三氯乙醛是无色挥发性的液体,带有刺激性很强的气味,在97.7℃沸腾.Chloral is a colorless, volatile liquid with a very penetrating odor and bo...
光线用棱镜 、 光栅或干涉仪分解.The light is resolved by prisms, gratings, or by an interferometer.迈克耳孙和莫雷使用一台迈克耳孙发明的干涉仪.An interferometer invented by Michelson was used by Michelson and Morely.不很精确的射电干涉仪观测表明,这个源的角径约为1.5弧秒.Comparativel...
The main reason is that cavitation erosion occurred in pervasion pipe of lubricator.经检查发现,主要原因是注油器扩散管汽蚀,以致注油器工作不正常,润滑油压偏低.Pay close attention to the conditions of lubricator and down - hole SSV, etc. during operation.作业期...
The number of warships stationed outside European waters roughly doubled.部署在欧洲水域之外的战舰数量差不多增加了一倍。The enemy warships were disengaged from the battle after suffering heavy casualties.在遭受惨重伤亡后,敌舰退出了海战.Warships have been disp...