The 10' high door makes use of a hydraulic pivot and a concealed magnetic locking device.

这扇10英尺高的大门内有液压装置外封磁石锁。

youdao

The device should not be installed inside a wall or in a concealed location.

这种装置不应该安装在 墙 内或隐蔽的位置。

youdao

The safety device can make up the insufficiency of the aging problem of structural silicone adhesive and eliminate the existing safety hazards of the glass curtain wall with a concealed frame.

这种安全保险装置，可以弥补结构硅酮胶存在老化问题的不足，消除隐框玻璃幕墙所存在的安全隐患。

youdao

In late December, Mr. Freeman got outfitted with a concealed recording device by the FBI and visited Mr. Longueuil at his apartment.

WSJ: They Were Best of Friends, Until the Feds Showed Up

This allows the device to remain concealed in a discreet location away from your computers.

ENGADGET: Elgato offers HDHomeRun TV tuner bundled with its EyeTV software for $180

Because of that, we moved to AITs -- advanced imaging technology -- to provide security screeners with a better opportunity to detect whether or not somebody is trying to smuggle, again, something concealed on themselves, concealed in what would be a normal device or in their luggage.

WHITEHOUSE: Press Briefing