mount frame binder（装裱框）是什么意思？音标发音+图解场景

装裱框 /ˈmaʊnt ˈfɹeɪm ˈbaɪndə/ n

English: mount frame binder · 装裱框

释义：Part used to hold and protect the photographic picture so that it can be handled and projected.

这个词出现在以下图解场景（1）