For it is, literally, a space hopper.

这简直就是太空跳跃者。

youdao

Of the chute, the slope requirements of fit, the best angle of 25 degrees -40 degrees, chute between the hopper and pumps to have a certain space, easy to clean hopper and sieve.

对溜槽，要求坡度适当，倾斜角度最好为25度-40度，溜槽与泵机料斗之间要留有一定的空间，便于清洗料斗和筛子。

youdao

He says the record for the furthest distance travelled on a space hopper in 24 hours is just under four miles.

BBC: Roger Auster