Plain bag punched handle of various shapes with or without side gusset or bottom gusset , or bags with soft or solid handle 平口袋打腰型孔、椭圆孔、圆孔等,袋口折边、侧面风琴;或底部风琴;或提手手挽袋
2.
Granular materials is the object or medium actuated by lots of engineering machinery and bulk solids handling machinery . digging and breakdown of the granular structure is a major actuating mode or objective in granular engineering 散体材料是许多工程机械与散货装卸机械的工作对象与工作介质,散体结构的挖掘与破坏是散体工程中的一个主要工作方式与目的。