double-barrel

基本解释

We normally use double- or triple-barrel fibula grafts.
我们通常使用两个或三个管状腓骨移植物。
Indicating matrix algorithm for double-layer lattice barrel vaults is a kind of mathematical system expressing the structural configuration with matrix forms.
双层筒形网壳的指示矩阵算法是基于将结构的形体用矩阵的形式来表示的一种算法；
This papaer deals with the static analysis models of double-layer lattice barrel vaults, which are a kind of large-span space structures developing rapidly in our country.
本文比较研究了正在我国迅速发展的大跨度空间格构式结构—双层筒形网壳静力分析的力学模型。

And as I understand it, he has a double-barrel -- he has a 12-gauge and a 20-gauge.
WHITEHOUSE: Press Briefing
What this chart does not reflect, however, is the influence of the high-yield market, which delivered a double-barrel technical boost to the loan market in August.
FORBES: Connect
It remains to be seen how Iraq could impact oil prices, but the price per barrel for crude has seen double-digit declines over the past month.
FORBES: Saudi Arabia Keeps OPEC Spigots Open