A moulin, a shaft in the ice opened by meltwater as it plunges into the depths of the glacier.

川瓯穴--由融水凿成直达川深处圆筒竖井。

I've worked on a couple of different folding patterns that were round and with wrap into a cylindrical geometry to fit in a rocket.

我曾经设计过几个圆作品，它可以成圆筒几何形，可以在火箭中应用。