Granite blocks, coral reef blocks, sandstone, bricks and glass fragments can be seen . these materials were there probably due to artificial reasons 可见花岗块、珊瑚礁块、砂岩块及砖瓦、玻璃等物分布,这些遗物应为外力堆放扰动所致。
With the development of pipeline transportation, the increase of amount and age, the unexpected erosion, abrasion and disfigurement by natural or artificial reasons, the accident of leak becomes more and more frequent 随着管道运输业的不断发展,管道的增多,管龄的增长,以及不可避免的腐蚀、磨损、缺陷等自然或人为损坏的原因,使管道泄漏事故频繁发生。