Specification for multilayer pipe type 2 , compression fittings , and compression joints for hydronic heating systems 循环加热系统用2型多层管压合配件和压合接头的规范
Tilizing sirocco - cycling heating system , honeycomb board complex molding machine can make full use of heat energy and lower the heating power 蜂窝纸板复合成型机采用热风循环加热系统,可充分利用热能,降低加热功率。