Set up scaffolding to provide safe access to roofs.
设置脚手架，以提供通往屋顶的安全通道。
Is there safe access between the ship and the wharf?
船舶与码头之间的通路是否安全？
Cage is adopted to provide safe access for bolting and testing.
用吊笼以提供螺栓连接和检验的安全通道。
Cage is adopted to provide safe access for bolting and testing.
用吊笼以提供螺栓连接和检验的安全通道。
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