大家在查：铜轴承高力黄铜古典观梯度转移理论企业社会责任指标体系气动搅拌机气压马达活塞式气动马达硬密封球阀密封比压

铜辊

By relying on water roll version of the series-water copper roll too light , water could not be piped to the plates, plates drying up dirty.

a seal of a motor shaft (23 ) which can drive the rotation of the copper roller (21 ) adopts magnetofluid seal;