- gravel envelope
- gravelenvelope
- 砂砾: land waste; gravel; granule; ...
- 封皮: paper strip seal front cover ...
- 封皮: [方言]1.(封条) paper strip seal2.(图书的封面) (of a book) front cover3.(包裹在物品外面的纸等) paper wrapping4.(信封) envelope
- 砂砾: land waste; [地] gravel; granule: grit◇砂砾泵 [机械工程] gravel pump; 砂砾草 gravelweed
- 包封皮: envelope
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