3、rsandbracketsmustbereplaced.有两块加强筋和肘板要换新。7. Twomorefootrestsandhandgripsshouldbeinstalledattheentranceofthesmallhatchcover.在小舱口盖的进口处再安装两只踏步和拉手。8. CheckingthejointaccuracyandstructureintegritybetweenNo.8andNo.9blockafterclosed.No.8与No9分段合拢后大接头装配精确性和结构完整性检查。9. Che