He eventually hopes to use rock-cutting ROVs that will drive across the sea floor, grinding ore as they go and sending it to the surface via a tube at a rate of 400 tonnes per hour.

• 他最终希望能用可以横穿海底的岩石开掘机ROV将矿石碾碎，然后通过一条管道以每小时400吨的速度将其运至海面。