“哥伦比亚”号航天飞机的第二次试验发射已从10月9日推迟到十一月4日。这是由于9月22日的一次氧化剂溢出事故造成的。这天上午1:15(格林威治时间05:15),当工作人员向位于宇航员座舱下前方的轨道器反作用控制系统前箱加注四氧化氮氧化剂的时候,地面设备上的一个快断阀门发生故障,使2-3加仑的氧化剂从“哥伦比亚”号的右前侧流了下来。由于航天飞机是垂直安装在发射台上的,所以氧化剂向下流了至少有6米长、0.75-2米宽。四氧化 The second pilot launch of the space shuttle Columbia was postponed from October 9 to November 4. This is due to an oxidizer spill on September 22. At 1:15 a.m. (GMT 05:15) this morning, when a staff member was filling the front of the orbiter reaction control system in front of the astronaut’s cockpit with nitrogen tetra-oxide oxidizer, a quick break on the ground equipment The valve failed, causing 2-3 gallons of oxidant to flow down from the right front of Columbia. As the space shuttle is mounted vertically on the launch pad, the oxidizer flows down at least 6 meters long and 0.75-2 meters wide. Tetoxide