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Screw Cap Water Sampling Bag Sterile Sample Bags 500ml PE Composite Sampling Bag with Sodium Thiosulfate Environmental Inspection Sampling Bag, Find Details and Price about Sampling Bag Sterile Sampling Bag from Screw Cap Water Sampling Bag Sterile Sample Bags 500ml PE Composite Sampling Bag with Sodium Thiosulfate Environmental Inspection Sampling Bag - Hunan BKMAM International Trade Co., Ltd.