1·Shell as used herein shall mean all pressure holding parts of the vessel in contact with the service fluid, including heads, nozzles, manholes and manhole covers.
这里的壁板指与系统介质接触的所有压力部件，包括封头、设备口、人孔及人孔盖板。
2·Nozzle and manhole location specified by the Purchaser shall not be changed by Vendor.
卖方不能改变买方指定的设备口及人孔位置。
3·Please move the manhole cover away.
请将人孔盖移开。
4·The manhole cover is too weighty to move.
人孔盖在重移不动。
5·The stress-distribution about manhole structure of middle-pressure reactor is desicribed by using the methods of finite element analysis.
采用有限元法对中压反应釜人孔凸缘结构进行了应力分析，揭示了其应力分布情况。