RSQ (REFERS TO MINE "RESCUE" - NO GEOGRAPHICAL SIGNIFICANCE; NO FOREIGN LANGUAGE MEANING

Instruments for sensing hazardous gases, instruments for monitoring hazardous environments, and devices for providing communications to and from hazardous environments, namely, instruments to be placed through a hole to assess an enclosed environment, instruments to be placed in an enclosed location to monitor the environment in the enclosed location, instruments to be lowered into or through an opening to assess the environment therein, instruments to facilitate communication between an enclosed location and an exterior location, sensor calibration apparatuses, and local and remote displays of gas levels