Cranes turn overhead as dump trucks and cement mixers nose onto the road.
吊车在头顶转动，翻斗车与混凝土搅拌机在路上小心谨慎地行使。
This information will be used to help determine the cement slurry specifications for both the dump bailer and cement packer.
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.
这个信息将用来为倾卸筒和水泥封割器确定泥浆规格。
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