| 国际防止散装运输有毒液体物质污名称 Description 外径 Outside diameter 内径 Inside diameter 螺栓节圆直径 Bolt circle diameter 法兰槽口 Slots in flange 法兰厚度 Flange thickness 螺栓及螺母 Bolts and nuts | International pollution prevention certificate for the carriage of noxious liquid substances in bulk (NLS Certificate) |
