>>326,327
ttp://en.wikipedia.org/wiki/Playing_card
'A complete set of cards is a pack or deck.'
'In most games, the cards are assembled into a "deck" (or "pack"), and
their order is randomized by a procedure called "shuffling" to provide
an element of chance in the game.'

このWikipediaの記述からすると「山札はpileが一般的」とは考え難いな。