包封;封皮;包裝紙
Envelopment \En*vel"op*ment\, n. [Cf. F. enveloppement.]
1. The act of enveloping or wrapping; an inclosing or
covering on all sides.
2. That which envelops or surrounds; an envelop.
envelopment
n : the act of enclosing something inside something else [syn: {enclosure},
{enclosing}, {inclosure}]