Abstract :
The present war emergency requires that the maximum use be made of existing equipment and systems and that a minimum of critical material be used for new equipment. This publication and other guides and reports of this series have been prepared for the information of users during the war emergency. Upon termination of the war emergency, they will be reconsidered by the Standards committee and the committees which prepared them, and will be approved, revised for normal use, or rescinded. This procedure is being followed in preference to the preparation of special emergency Standards which might involve redesigning and drastic changes in manufacturing practices. These guides will accomplish the maximum conservation of critical materials, since they provide for the maximum use of existing equipment and systems, as well as new equipment, without changing the fundamental basis on which the present Standards have been prepared.
