There is no air gap between wall and buried copper pipe.

壁体与埋管间没有气隙热阻。

youdao

The thermal properties and deformation of new type cast copper stave with buried copper pipe were studied.

系统分析了高炉用新型埋管式铸铜冷却壁的热态性能及热变形。

youdao

Shizishan Copper Mine is a skarn deposit living with gold and ciliver, one of the big buried Copper Mines in the downstream of Yangtze River.

狮子山铜矿是长江中下游大型埋藏型铜矿之一，属矽卡岩型伴生金银铜矿床。

youdao

Many residents in the western part of the island remain without telephone service since Sandy, because saltwater destroyed copper cables buried underground.

WSJ: The Fire Island Blues

The water was recovered from deeply buried sulphide ores containing zinc and copper.

BBC: Deep Canadian mine yields ancient water

But the real attraction is Friedland himself and his tales of copper and gold deposits buried under the Gobi Desert.

FORBES: The Promoter