bipack.
/bahy-pak/US // ˈbaɪˌpæk //
双层包装,双包,双肩包,双层包
Definitions
n.noun · 名词
- 1.
Photography.
- ›two separate films, each having an emulsion layer sensitive to a different color, held together with their emulsion layers facing for simultaneous exposure through the back of one.
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