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.
Trigger Price Mechanism. The TPM is an antidumping mechanism designed to protect U.S. industries. from underpriced imports. First used in 1978 to protect the steel. industry, the TPM is the price of the lowest cost foreign producer. Imports priced below the trigger price are assessed a duty equal to the.