S Your new gas furnace may have been installed in one of two. ways, as a direct-vent (2-pipe-Fig. 2) application or as a. non-direct vent (1-pipe-Fig. 3) application. S In a direct-vent (2-pipe) application,your furnace uses air. from outside the home for combustion and ventsflue gas to the. outdoors.
For the biological concept, see Anti-predator adaptation. A defence mechanism is an unconscious psychological mechanism that reduces anxiety arising from unacceptable or potentially harmful stimuli. Sigmund Freud was one of the first proponents of this construct.
Use 'defense mechanism' in a Sentence. You need to come up with a good defense mechanism when you are trying to figure out how to protect your company. 16 people found this helpful. I thought that the man shouting was just his defense mechanism so he would not hear the truth from other people. 14 people found this helpful.