foot wall

常见例句

• A vertical fault has neither a footwall nor a hanging wall.
  具有直立斷層麪的斷層既無上磐，也無下磐。
• Then the block in the southern side of this fault is the hanging wall and the block in the northern side of this fault is the footwall.
  那麽，位於這條斷層南側的巖層是上磐，位於這條斷層北側的巖層則是下磐。
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