Date of production (Date of manufacture) : on the seal.

生产日期：见封口处。

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Compared with any other processing methods, laser technology is a unique way to produce micro-pores on the seal face.

对各种加工方法进行比较可知，在机械密封端面上加工微孔，激光表面处理技术是惟一有效的加工方法。

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The seal on the box broke when it fell from its hiding-place.

盒子从隐藏处掉下时上面的封口破了。

《柯林斯英汉双解大词典》

But knowing what percentage this is of the total amount leaking from the well will not be possible until a tight seal is on the well.

VOA: standard.2010.06.14

and Pembroke area there's a place, "the steps", that if you step on the seal,

在彭布鲁克区，有个地方叫“台阶”，如果你踏在了印记上，

布朗的学生们 - SpeakingMax英语口语达人

"By moving ahead with this World Trade Organization challenge, we stand behind the thousands of Canadians in coastal and northern communities who depend on the seal harvest to provide a livelihood for their families, " Ms Shea said.

BBC: A seal laying in the Gulf of St Lawrence, Canada

That finally lifted Gradi's men back out of the drop zone - and they held on to seal the victory on a remarkable afternoon.

BBC: SPORT | Football | Championship | Crewe 2-1 Coventry

The Vice President used the official presidential seal on his podium, as the President did on Friday at Carnegie Mellon, using the presidential seal, at what was clearly announced as a campaign.

WHITEHOUSE: Press Briefing