护壁

There was a low protecting wall to knock down the heat blasting from the pit of the furnace.

有一堵低矮的挡住从炉膛里喷出的火焰。

The practice of subterrene drilling indicates that this method not only adapts to geothermal well, but also is a new pipeless reinforcement method to be applied widely.

热熔钻进的实践证明，该法不仅适热钻井，而且也可以为一种新的无套管法推广应。