求翻译：钢结构安装前，经抄平放线，严格控制基础部位与支承面的纵横轴线和标高，并进行验收，提出验收合格报告资料。验收内容包括基础坐标和标高、轴线以及螺栓尺寸，保证以上内容符合规范和图纸要求。并清理作业面,确保基础顶面及支承面洁净,严禁有杂物和污染是什么意思？

Before installation of the steel structure, copy the flat line, strict control of the vertical and horizontal axis and the elevation of the basic parts of the bearing surface, and the acceptance of the acceptance report data. Acceptance includes the basic coordinates and elevation axis and bolt size

Steel before installation, the CC flat line, and strictly control the underlying area and support the highest elevation and aspect ratio axis, and acceptance, Acceptance reports information. Acceptance includes base coordinates and elevation, and axis, as well as bolt size to ensure that these requi

Before the steel structure installment, after copies puts the line evenly, controls the foundation spot and the area of bearing strictly vertically and horizontally the spool thread and the elevation, and carries on the approval, proposes the approval qualified report material.The approval content i

Steel before installation, copy the flat line, strictly control the vertical and horizontal axis and elevation of the underlying location and seating, and acceptance, acceptance report presented information. Acceptance includes dimensions, axis lines, as well as basic coordinates and elevation bolts

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