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来自维基百科，自由的百科全书
古籍中记载甚多。由于使用环境不同，结构大同小异。有的装有刀枪；有的置屏幔；有的装绞车，便于和后方联系，以运送物品等。
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
