Endeavour was set to launch in late April, but an electrical problem in a heater circuit forced a delay. Engineers replaced the switchbox and installed new wiring.
奋进号原订四月下旬发射，但是由于加热器中电路发生问题，被迫延期。工程人员更换了电路开关盒，并且安装了新线路。
Endeavour was set to launch in late April, but an electrical problem in a heater circuit forced a delay. Engineers replaced the switchbox and installed new wiring.
奋进号原订四月下旬发射，但是由于加热器中电路发生问题，被迫延期。工程人员更换了电路开关盒，并且安装了新线路。
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