The paper introduces the role of ventilating platestone and rubble foot protection in improving permafrost and maintaining the stability of permafrost.
着重介绍了多年冻土施工通风片石和碎石护坡改善多年冻土隔化下沉维持冻土的稳定。
2
Use the FORKLIFT on the stoneplate to reveal a symbol engraved in the stone underneath.
使用上的石板材叉车透露刻在石头底下的一个象征。
3
Metals are opaque so that even the thinnest plate can keep out the light as well as a stone wall.