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Today's advanced tube plugs offer efficient solutions for high pressure heat exchangers - BIC Magazine
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Prescott Plastics 1 1/2” (38.1 mm) Square Plastic Plug Insert, Black End Cap for Metal Tubing, Fences, Glide Protection for Chairs and Furnitures (10 Pack) - - Amazon.com
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Prescott Plastics 1" Inch (25.4 mm) Round Plastic Hole Plugs, Inserts, Black End Caps for Metal Tubing, Hardware Plug, Fences, Glide Protection from Chair Legs and Furniture - Pack of 4 - - Amazon.com
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TCO glass plug cycled open in well with nitrogen-filled tubing saves A/S Norske Shell 24 hours' rig time - TCO
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Amazon.com: 2" Black Plastic Plugs for Square Tubing by Caplugs Package of 4 : Industrial & Scientific
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