open conduit

基本解释

Hamas may also keep tunnels open for weapons. The burrows are a conduit for cash, too.
哈马斯也可能会为了运送武器而开放隧道，同时，这些隧道还用于运送现金。
The underground penstock for the Husonghe Hydroelectric Power Station was designed using the calculation method of raising the allowable stress as an open conduit;
户宋河电站地下埋管主管的设计，采用按明管设计提高允许应力的计算方法；
One cable drops to the ground and then continues inside a 50mm plastic conduit under an open space to the other block where it rises in a duct alongside the main stairs.
一根电缆下降到地面，然后在50毫米至下一个开放的空间，其他的块在它在沿着主楼梯管塑料管继续上升。

People said that he was just an open conduit to the White House and that he'd never stood up to political pressure from the White House.
NPR: Lawmakers Question Mukasey on Ideas
Mr Hawali and other Saudi radicals think the government should use them as a conduit to open a dialogue with the rebels.
ECONOMIST: Saudi Arabia
As to whether or not or the extent of the banking system has been applied as a conduit to launder illicit funds remains an open question.
FORBES: Life On Cyprus After The Bailout