cas·ing /ˈkesɪŋ/
 箱,蓋,包裝,框,套管
 Case, v. t. [imp. & p. p. Cased p. pr. & vb. n. Casing.]
 1. To cover or protect with, or as with, a case; to inclose.
    The man who, cased in steel, had passed whole days and nights in the saddle.   --Prescott.
 2. To strip the skin from; as, to case a box. [Obs.]
 Cash, v. t. [imp. & p. p. Cashed p. pr. & vb. n. Casing.] To pay, or to receive, cash for; to exchange for money; as, cash a note or an order.
 Cas·ing n.
 1. The act or process of inclosing in, or covering with, a case or thin substance, as plaster, boards, etc.
 2. An outside covering, for protection or ornament, or to precent the radiation of heat.
 3. An inclosing frame; esp. the framework around a door or a window. See Case, n., 4.
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 casing
      n 1: the housing or outer covering of something; "the clock has a
           walnut case" [syn: shell, case]
      2: the outermost covering of a pneumatic tire
      3: the enclosing frame around a door or window opening; "the
         casings had rotted away and had to be replaced" [syn: case]