temperature controller is The whole structure, small volume, light weight,Get national ... Imported bidirectional thyristor controlled temperature, good performance. 2:Simple operation, easy installation and maintenance, low failure rate. 3:Show intuitional, clear ... weight, low noise, beautiful appearance. The stability and good shockproof, easy maintenance. 5:GB212 GB, GB5447, superior GB5449, GB/T2002- ...