She told us to glue and seal the back of envelopes.
她叫我们用胶水把信封的背面封好。
We seal the back of envelopes.
我们把信封封口。
Gold product details: raincoat fabric, seal, back office.
金来雨衣产品细节：脖子处、面料处、封口处、背后处。
It can seal bags on the middle of back or edge.
筷袋封口处可选择背面中间或边上。
Shaft seal is adapted, which can bear higher back pressure.
采用进口轴密封，能承受高背压。
The seal ring shell has a front piece and a back piece secured together.
密封环壳体具有紧固在一起的前件和后件。
The seal ring shell has a front piece and a back piece secured together.
密封环壳体具有紧固在一起的前件和后件。
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