沙封，主要供一般大型、笨重金属或合金机件淬火、退火、时效等各种机械零件热处理之用。
沙威在当天晚上写了一封信。
她曾在一封为解释优先股方案而写给沙费尔专员的信上签了自己的名字。
She had personally signed one letter to Commissioner Schaffer explaining the preferred stock proposal.
另有一封信，僧侣安沙兰带着，马琪搜这位僧侣时，交给塔克修道士念。
There was also a letter that Anselm the clerk carried, which Much, having searched the clerk, handed to friar Tuck to read.
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