... ! The two sides of the zipper have two different colors in sharp contrast. Thus, you can tell whether or not the ... out.) C. Close the valve tightly.D. Put the bag in a cool and ventilated place. Certificated Approval :ISO9001:2008 ,Design ... ,CE, RoHS, and so on. Market: * North America: United States,Canada and so on. *South America: Argentina,Brazil, Colombia, Chile and ...