郑州铁路大学:涂层应该怎么翻?

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/09 07:41:29
无缝纫针孔,PP 或是其他普通涂层,在缝纫制袋的过程中总有针孔在滤袋的表面,

Have no sewing pinhole, PP or other commonnesseses draw the layer, total have the pinhole surface in bag of 滤 in the process of sew make bag,

coat

coating (油漆等的)涂层,外层