这样就可以把蜂房摞起来，因巢框是通用尺寸，故可在蜂房间交换，人们可事先准备好巢框。
This makes hives stackable and since the frames are of universal size, they can be
这样的尺寸不受通用公差控制。
通用的手提袋印刷标准尺寸分三开，四开或对开三种。每种又分为正度或大度两种。
Universal bag printing standard size three open, four open four-color or three. Each kind is divided into two kinds of positive degree or degree.
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