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krypton (31)CAS RN:7439-90-9
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DWS SPECIALTY GAS CO., LTDTelephone:+86 559-6511610
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PraxairTelephone:+1-716-879-4077
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Matheson Tri-Gas Inc.Telephone:+1 800-424-9300
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International Gases and Chemicals Ltd.Telephone:+44-0-1782-565556
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SIAD S.p.A.Telephone:+39035.328.326,+39035.328.111
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Sulfur Properties and CompoundsTelephone:(915) 675-5311
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STB Isotope GmbHTelephone:+49 (0)172-543-71-72
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PROMY International GroupTelephone:+1-510-758-1388
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Air Products S.A.Telephone:33 -1-44.92.51.00
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Dakota Gasification CompanyTelephone:701-221-4400