知识贝壳
知识贝壳
所属栏目：聚合物科学与工程
Thermoplasticitemswithauniformcrosssectionareformedbyextrusion.Thisincludesmanyfamiliaritemssuchaspipe,hoseandtubing,gaskets,wireandcableinsulation,sheeting,window-framemoldingsandhousesiding.Moldingpowderisconveyeddownanelectricallyoroil-heatedbarrelbyar ......（本文共 8874 字 ） [阅读本文]>>