进料口
inlet point
document glass
dog house
material entrance
feed port
Feed-in Meatus
coupling between two axis
稳流仓进料口
inlet of the stable chamber
出口直径
the exit diameter of nozzle
outlet diameter
大口径直缝钢管生产线
Large-sized straight welded pipe production line
大口径直缝焊管
Large-sized straight weld pipe
butt-welded pipe
large diameter longitudinal welded pipe