NGEC 2: Readings in the Philippine History:GENERATOR
NGEC 2: Readings in the Philippine History:FILTER
NGEC 2: Readings in the Philippine History:EVAPORATOR
NGEC 2: Readings in the Philippine History:CONDENSER
NGEC 2: Readings in the Philippine History:COMPRESSOR
NGEC 2: Readings in the Philippine History:BOILER