test hole : 50mm hole on the left side of a body , a plug for connecting external power or signal lines.
Altitude Test Chambers/Refrigeration system:
1.European and American impored energy-efficient low-temperature hermetic compressors industrial
2.The cooling method using air-cooled , the full range of environmentally friendly refrigerants
3.impored dry filter , solenoid valve with frozen
4.air-cooled condenser , with cooling or water-cooled motor unit coil
5.Cryogenic refrigeration system usi