亦称“封泥”。古代文书都用刀刻或用漆写在竹简或木札上,封发时装在一定形式的斗槽里,用绳捆上,在打结的地方,填进一块胶泥,在胶泥上打玺印;如果简札较多,则装在一个口袋里,在扎绳的地方填泥打印,作为信验,以防私拆。封发物件也常用此法。这种钤有印章的土块称为“封泥”。主要流行于秦、汉。魏晋后,纸帛盛行,封泥之制渐废。
而且,油井队没有进行实验来证明水泥封堵是合适得。
The team then failed to run a test to establish that the cement seal was adequate.
这个信息将用来为倾卸筒和水泥封割器确定泥浆规格。
This information will be used to help determine the cement slurry specifications for both the dump bailer and cement packer.
近日,官方宣布BP在墨西哥湾沿岸的马孔多油田“死亡”,或已被水泥封闭。
BP's Macondo oil well off the gulf coast was officially declared to be "dead", or sealed by cement.
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