The security door is so firm that nobody can break in.

防盗门这么结实，没有人能闯进来。

youdao

One time, the public security door of our building was broken.

有一次，我家楼的公共防盗门坏掉了。

youdao

The factory establishment and 2000, a security door manufacturer of advanced technology.

本厂建立与2000年，具有制造防盗门的先进技术。

youdao

Security forces have also launched a door-to-door search for members of the group.

VOA: standard.2009.07.30

He says the current U.S.strategy of pushing for a two-state solution is not winning support from Israelis who want to see a partition but are worried about Israel's security with Palestinians running their own state next door.

VOA: standard.2009.10.31

The red metal security door that is used to close up the stall in the evenings is pockmarked with dozens of bullet holes.

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Like many Moscow apartments, it did not look much from the outside - a heavy, grey-steel security door, a scruffy communal entrance hall, a grand old staircase with a cast-iron banister spoiled by multiple layers of shiny, off-blue institutional paint.

BBC: In Moscow, history is everywhere

This "looking through" I interpret as similar to the way the door security guy at a posh night club "looks through" you as you attempt to persuade him your are on the guest list.

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