求翻译：我们进行了厂房钢结构的安装，土建，和围护结构的安装，本人4-6月在兰州现场主要协助项目经理，对材料，竣工资料，现场吊装等事宜进行管理。是什么意思？

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We have had a steel plant of the installation, construction, and the structure of the installation, i 4-6, on-site in Maryland, primarily to assist project managers on the material, information, and was completed on-site lifting, management.

We have carried on the workshop steel structure installment, the construction, with the surrounding protection structure installment, myself 4- in June in Lanzhou scene main assistance project manager, to the material, completion material, matters concerned and so on scene hoisting carries on the ma

We have factory installation of steel structures, construction, and installation of exterior-protected structure, I in April-June, the field primarily to assist program managers in Lanzhou, materials, completion data, manage on-site matters such as lifting.

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