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。

youdao

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。

youdao

In our production, life, it used to straight-through, small-caliber valve, ball valve is now gradually being replaced.

在我们的生产、生活中，过去常用直通式、小口径截止阀，现在已渐渐被球阀所取代。

youdao

"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?