专业的会议服务团队，适合各类行政、企业、天体会议、洽谈及商务签约仪式。
Professional team of conference services for all types of administrative, business, astrophysics meetings and business negotiations ceremony.
本文论述了铁路上常用的太阳高度法测定天体真方位角各类误差的影响。
In this paper, all kinds of error's influence was expounded of the sun altitude method often used on the railway upon determining heavenly body azimuth.
应用推荐