Why bad. Good food sack to make a hole?

Dear every leader, distinguished guests, dear elder brothers and sisters, small make up want to die you, and can't wait to share knowledge. Always shopping friends should find snack foods it sells in the supermarket on food packaging bags, there is a hole, and the hole is so neat. Small make up the beginning is very curious, why do the good food sack to punch holes? According to our technical personnel in the factory, to food sack punch so there are several main functions: one, the plastic bags used in toys size to a certain range, must want to punch. Prevent children from playing set into the head not breathable and suffocate. 2, general food packaging is not to need to punch, but in order to release after sealing bag air, avoid air occupy space, just punch deflated, stomatal usually play in the bag. Three, playing in the round hole on the top of the food packaging bags or butterfly shaped hole, that is used for hanging, hanging hole. Overall food sack punch is actually has a lot of role, one is for the sake of safety, in addition to more convenient to use. Everyone knows!
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