The invention relates to an exhaust HEAT exchanger (1), in particular an exhaust cooler for motor vehicles with exhaust recycling and comprising a housing sleeve (2) for a coolant and a nest of tubes (3) with exhaust flowing through and coolant circulating around the above which are mounted ...
JIN Tai-jun ,.Situation and Countermeasures of the Relationship betweenTown and Village in China.[J];扬州大学学报(人文社会科学版),2002-04JIN Tai-jun ,... TJ Jin - 《Journal of Yandzhou Uinversity the Humanities & Social Science Edition》 被引量: 19发表: 2002年 Problems and countermeasures...
Tactile architectural models and maquettes have been built in the external public spaces of Polish cities since the latter half of the 00s of the 21st century. These objects are designed for the blind, but also other people - tourists, children, and those who arrive in wheelchairs. This coll...
A fluid level control circuit with a safety test function for a boiler water level probe of a fail safe type is connected to a field effect transistor controlled amplifier having a well defined threshold of operation. A safety test switch means is provided to pull the amplifier's input down ...