The main units are single-wheeled and retract into wheel troughs in the fuselage.

主单元是单轮并收起到机身下轮槽中。

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The keys in molecular design of side chain liquid crystal polymers are analyzed from the main chain structures, types of main units and flexible spacing.

从主链结构、液晶基元类型和柔性间隔出发介绍了侧链液晶高分子分子设计的关键。

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The sensor units, which comprise a lens, image sensor and cable for connection to a main unit, can be installed in tight places and are sold separately from the main units.

传感器设备包括一个镜头，图像传感器和用于接到主设备的电缆。它可以安装到一个紧凑的地方，而且可以与主设备分开出售。

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All of the Bushehr plant's systems will be tested, including its main units, auxiliary peripheral systems and initial circuits, ISNA said, quoting Khazaneh.

CNN: Iran to test nuclear power plant

In December, more than 260 leaders of the main FSA units from across Syria agreed at a meeting in Antalya to a unified command structure.

BBC: Syria rebel commander Riad al-Asaad wounded by blast

British soldiers said that the main resistance was coming from the paramilitary units.

CNN: Basra offers a lesson on taking Baghdad