Conclusion: Human umbilical cord veins are good substitutes for small-caliber arterial grafts.

结论：脐带静脉可作为小口径动脉移植的替代材料。

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Objective To investigate the possibility of constructing small-caliber artery by means of tissue engineering.

目的探讨运用组织工程技术构建血管组织的方法。

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The barrel liquid-cooling technology is widely used in ground-based air-defense and anti-missile small-caliber automatic gun and ship-borne medium or small caliber guns.

身管液冷技术在陆基防空反导小口径自动炮和舰载中、小口径火炮中被广泛采用，研究身管液冷状态下的温度分布对于火炮发射安全性和武器效能具有重要意义。

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"It will hit so much of these small-caliber rockets and 'misslets,' that it will change the equation for the other side."

VOA: standard.2010.07.20

Leaning forward, Mike Fifer squeezes off a round from a small-caliber, double-action revolver, piercing the quiet, autumnal New Hampshire countryside.

FORBES: Behind America's Gun Boom: Inside The Comeback At Sturm, Ruger

They are specifically designed to protect occupants from ambush attacks, incorporating bullet-proof windows designed to withstand small-arms fire, such as .223-caliber rifles.

FORBES: Why The Heck Is DHS Buying More Than A Billion Bullets Plus Thousands Of Guns And Mine-Resistant Armored Vehicles?