btw "slots" is indeed somewhat correct translation for 插槽, however they seem not to be the type of slots you are thinking of.
http://www.google.com.hk/images?hl=en&q=%E6%8F%92%E6%A7%BD&um=1&ie=UTF-8&source=og&sa=N&tab=wi&biw=1280&bih=675&hl=zh-CN&sourceid=cndr
with IDN domains sometimes a...