|1||1998 - 12/07/1998 - Respiratory protection for anhydrous ammonia storage installations.|
|2||1991 - 01/31/1991 - Back-welding of threaded connections in anhydrous ammonia service.|
|3||1985 - 07/16/1985 - Standard applicable to two point suspension scaffolds and power platforms used in window cleaning and to hazards in refrigeration plants.|
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