9Preliminary anti-action
If it will be necessary to do an action with both harmful and useful effects, this action should be replaced with anti-actions to control harmful effects.• Buffer a solution to prevent harm from extremes of pH.
Create beforehand stresses in an object that will oppose known undesirable working stresses later on.
• Pre-stress rebar before pouring concrete.
• Masking anything before harmful exposure: Use a lead apron on parts of the body not being exposed to X-rays. Use masking tape to protect the part of an object not being painted
This principle is proposed to solve the following contradictions:2/32 5/27 6/4 7/14 8/14 10/3 10/7 11/14 12/15 13/14 14/6 14/8 15/3 17/3 17/4 19/14 20/2 22/2 27/3 29/2 32/34 34/9 34/14 36/33 37/25 38/15