团结舱有6个舱门，其中一个与曙光连接，其余的门与其他太空舱相连接。
Unity has six hatches. One is connected to Zarya, and others serve as connectors for other modules.
所述的加强结构有两个，分别与车辆的门的框相连接，形成一个回路结构；
Two reinforcement structures are arranged on longitudinal beams, and the two reinforcement structures are respectively connected with each door frame to form a loop structure;
所述的加强结构有两个，分别与车辆的门的框相连接，形成一个回路结构；
Two reinforcement structures are arranged on longitudinal beams, and the two reinforcement structures are respectively connected with each door frame to form a loop structure;
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