73833775
Oct 25, 1989
Jan 1, 1991
A KIT FOR COLLECTING A SAMPLE OF AIR FOR DETERMINING THE RADON CONTENT OF THE SAMPLE OF AIR INCLUDING A CHARCOAL CANNISTER FOR COLLECTING AIR, INSTRUCTIONS ON HOW TO COLLECT THE AIR AND A REQUEST CARD TO BE FILLED OUT WITH THE NAME AND ADDRESS OF THE REQUESTER
Electrical and Scientific Apparatus