外壳：一个设备或物体的外部保护结构，通常用于保护内部组件免受损坏。
外壳
... outer engine 机外 outer housing (万向节)外壳 outer race ①(滚动轴承)外圈②(等速万向节)钟形壳 ...
The outer housing includes a grip (14, 18) to be grasped by a user.
外壳包括将被使用者抓握的手柄(14、18)。
The invented stopper is composed of slide oil cylinder, piston rod units and outer housing.
一种铁路全液压制动顶，由滑动油缸，活塞杆组件，及外壳组成。
The power tool includes an inner housing (50) at least partially housed within and spaced from an outer housing (30).
所述动力工具包括内壳（50），该内壳至少部分地容纳在外壳（30）中并且与外壳（30）隔开。
Labour MP Margaret Hodge, chairwoman of the cross-party public accounts committee, said there was the potential for "sudden and unmanageable population movements" between inner and outer London and potential housing shortfalls were "deeply worrying".
Even so, they face a three-year wait for a place in the Jingyuan Road housing project in Beijing's outer Shijingshan district, far away from any public transportation.
In Shanghai, for instance, Mayor Han Zheng this week said that nonlocals would be permitted to rent subsidized units in certain public-housing projects in the city's outer reaches, whereas in the past eligibility hinged on their employment.