four-cycle internal combustion engine

air-cooled injection type internal combustion engine

air-cooled internal combustion engine

antiknock substance for internal combustion engine

bridge control internal combustion engine

British Internal Combustion Engine Maunfacturer’s Association

British Internal Combustion Engine Research Association

British Internal Combustion Engine Research Institute

Chinese Internal Combustion Engine Engineering

Classification of internal combustion engine oils

combustion of internal combusition engine

cycle internal combustion

Development of Internal Combustion Engine

dual-source gas internal-combustion engine heating

electric power plant with internal combustion engine

electric power station of internal combustion engine

engine internal combustion

Four-stroke Internal combustion Engine

Four-stroke Internal Combustion-Engine