"Offshore unit" means any fixed or floating offshore installation or structure engaged in gas or oil exploration, exploitation or production activities, or loading or unloading of oil.
“近海装置”系指从事气或石油的勘探、开发或生产活动或油的装卸的任何固定或浮动的近海装置。
To complete the installation and unloading of steel bracket of such great weight smoothly involves complex structure stress and many difficulties in swing.
要安全顺利完成如此大重量的钢支架安装与卸架施工，结构受力复杂，吊运难度大。
Installation, sliding and unloading process of steel roof are introduced.
介绍了各部分钢屋盖安装、滑移、卸载施工的全过程。
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