The cleaning tube comprises an outer tube and an internal valve.

该冲洗管包括外管和内阀。

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This will tend to preserve the internal valve, avoiding disruption of the dorsal aesthetic lines, and inverted V deformity, and airway compromise.

这样做可以保持内鼻阀，避免鼻背美学曲线的中断，预防倒V畸形出现和气道完整性破坏。

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Thus far, only a handful of folks internal to Valve have gone hands-on with TF2's VR Mode, and it's clear the hardware team is eager to get more feedback.

ENGADGET: Valve's Joe Ludwig on the uncertain future of virtual reality and partnering with Oculus

And then Valve's internal hardware prototypes popped up, confirming what we've heard murmurs of for months: the company's head down on creating a PC for your living room.

ENGADGET

Even if the Steambox initiative fizzles, there's always the massive ongoing success of Steam's digital storefront to fall back on. 2013 may be the year that Valve attacks, but it's not just the company's internal hardware projects that are up for the challenge.

ENGADGET: 2013: The year that Valve attacks HD