- keystone disk
- n.基斯顿磁盘
English-Chinese dictionary of mining (英汉矿业大词典). 2013.
keystone disk
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Shive — A shive is a wooden or plastic fitting used in ale casks. It is found on the curved side of the cask, arranged so that when the cask is on its side and the keystone is at the lowest part of the rim, the shive will be the highest point of the cask … Wikipedia
