Then last week, other stress tests on an airframe showed that the plane needs strengthening at 18 points on either side of the fuselage just above the area where the wing attaches.
就在上周，机身结构的其他应力测试显示，就在机翼连接的面之上的机身每侧需要强化18个点。
Once all the airframe sections have been assembled, the wing and tail sections are bolted to the fuselage and the landing gear, controls, and fuel system are installed.
一旦所有的机身部分已组装完成，机翼和机尾部分是固定在机身和起落架，控制和燃油系统的安装。
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