送交者: skipper3 于 2006-1-09, 13:24:10:

The gap between train and rail is only a few mm. What if the rail is covered with light snow or ice?

• what is a 300+km/hr railway transportation between BJ and - skipper3 (741 bytes) 2006-1-09, 13:41:27
  • 建议非常好，但达不到院士的高度，不够60度 - 田牛 (76 bytes) 2006-1-09, 13:53:46
    • these 院士 are all amature WenKe, whcih is the primary - skipper3 (467 bytes) 2006-1-09, 14:15:05

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