Where does Datong internal combustion engine driver sign the contract?

Datong internal combustion engine driver signed a contract with the company where you work.

Classification of internal combustion engines: number of cylinders: single-cylinder internal combustion engines and multi-cylinder internal combustion engines are classified according to the fuel used: gasoline engines, diesel engines, liquefied petroleum gas engines, biogas engines and natural gas engines.

According to the number of piston strokes, there are two-stroke internal combustion engines and four-stroke internal combustion engines. Classification by intake mode: non-supercharged internal combustion engine and supercharged internal combustion engine. According to the cooling mode, it is divided into liquid-cooled internal combustion engine and air-cooled internal combustion engine.

Classification by speed: high-speed internal combustion engine and low-speed internal combustion engine. Classification by cylinder arrangement: vertical internal combustion engine, horizontal internal combustion engine, V-type internal combustion engine and opposite internal combustion engine. Classification by use: internal combustion engines for automobiles, tractors, ships and engineering engines. Classification by ignition mode: ignition internal combustion engine, compression ignition internal combustion engine.