jgg     2012 32 (3):  135-138    ISSN: 0412-1961  CN: 21-1139/TG EFFECTS OF SET AND DROP NUMBERS ON ABSOLUTE GRAVITY MEASUREMENTS Xiao Fan;Zhang Songtang;Zhang Hongwei;Wang Yingjian ;and Li Jiangu 61365 Troops of PLA, Tianjin 300140 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null