“F.S.”型防坠器近年来在毛主席的革命路线指引下,经过有关部门的探索和努力,已基本试制成功,并早已推广使用。然而该防坠器性能的好坏,直接关系到井筒和升降人员的安全,因此,当它通过试验投入使用时,对试验中要求的各项数据必须严格遵守,而有必要进一步将这些数据,从理论上来把它弄清楚。 In recent years, under the guidance of Chairman Mao’s revolutionary line, the “F.S.” type anti-dropping device has been basically trial-produced and has long been promoted for its use after exploration and efforts by relevant departments. However, the performance of the fall arrest device is directly related to the safety of the wellbore and the lift personnel. Therefore, when it is put into operation through the test, all the data required in the test must be strictly observed, and it is necessary to further integrate the data, In theory to make it clear.