如指定使用外螺纹及内螺纹或榫面及槽面法兰，容器设备口法兰端面应为凹槽型。
When male and female (M&F) or tongue and groove (T&G) type flanges are specified, the nozzle flange facing of the vessel shall be of female or groove type.
设备口法兰的类型、等级及端面应符合买方图纸或数据表的规定。
The type, rating and facing of nozzle flanges shall conform to those specified in Purchaser's drawing or data sheet.
启动前应除去减速机输入轴迷宫密封端面和输出传动法兰迷宫密封外圆表面，以及呼吸器上的防锈包装及胶带。
Prior to startup, get rid of tape from labyrinth seal end of input shaft, labyrinth seal outer surface of output drive flange and respirator.
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