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OHSAS 18001 Occupational Health and... 2005-5-1    Environment Manufacturing of Production Activity of&nbs...   API 6A Certificate of Authority to ... 2005-5-1    valves manufact ured under the conditions of API6A...   API 6A Certificate of Authority to ... 2005-5-1    valves manufactured under the conditions of API6A...   XL-T Series XL-F Series XL-X Series Duck mouth type rubber check valve Hot-Stamping silica gel rubber roller Draining rubber check valve JD/SD Rubber shear vibration isolator Rubber reducing joint