罐壁（罐顶）人孔Tank wall (top) Manhole

人孔是安装于储罐壁下部，是操作工人在建罐、清罐、倒罐时的出入口，而人孔的强度和密封是技术关键。我厂生产的罐壁人孔主要有以下几个标准系列供选型。

Manhole is installed in the lower part of the tank wall, are operative when the built tanks, tank cleaning, pouring entrances and exits, and the strength and sealing of manhole key technology. I plant the production of the tank wall manhole for the selection of the following standard series.