sierraSquare bottom three-dimensional packaging bag

PVC soft film packaging,sierra square bottom packaging bag, aluminum bag window packaging bag, three...

sierraElectric insulation crinkle paper

sierra Insulating Wrinkle Paper, also known as crumpled paper,sierra refers to a type of processed p...

sierraFood storage bag

sierra Body moisture-proof bags (grain storage bags, aluminum-plastic composite bags, vacuum food ba...

sierraAluminum-plastic film material

The sierra moisture-proof effect of aluminum-plastic film material is 80 times that of ordinary poly...