double-ply bag 双层袋
double-ply pump 双联抽油泵
double-ply 双层的
double-ply belt 双层皮带
double-ply gear 双层袋
double-ply y bag 双层袋
Single ply embossing, double ply embossing, steel to steel embossing.
单压花，双面压花，钢对钢压花。
HY742 double twister is using in double-ply and manifold yarn twisting, it is multi-motor double twister which controlled by microcomputer.
HY742型倍捻机是一种用于双股或多股纱线加捻的微电脑控制多电机倍捻机。
With this seven ply line, single wall, double wall and triple wall corrugated board can be produced.
七层瓦楞纸板生产线，可以生产三层，五层及七层瓦楞纸板。
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