护壁

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

有一堵低壁挡住从炉膛里喷出火焰。

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.

热熔钻进实践证明，该方法不仅适用于地热钻井，而且也可以为一种新无套管壁方法推广应用。