As the team struggles to track down one of the robbers, what clue do they find inside a 10-inch pipe to suggest that their quarry somehow escaped through that impossibly narrow passage?

队员们全力找寻劫匪的踪迹，他们在十英寸宽的管道里发现了什么线索，表明了他们的目标是从这不可思议的狭窄通道里逃跑的？

youdao

Each day 230, 000 gallons of sewage pass through before discharging, 99% decontaminated, through a 10-inch pipe into the harbor where fresh-faced grade-schoolers learn to tack.

FORBES: Muckraker

If a government-mandated market for pollution offsets ever materializes, the 26-inch pipe hauling away carbon would be able to handle the plant's waste gas and another 5 million tons from other sources in New Jersey.

FORBES: Technology

The large hole is believed to have been caused by three small leaks on a four-inch water pipe.

BBC: Dundee's Albert Street reopens after huge void find