HS code mapping for infant formula imports

* The HS code mapping for infant formula importsrole of the engine crankshaft: The engine crankshaft is an important part of the engine. Its function is to transform the up and down reciprocating motion of the piston into a rotational motion, so as to push the vehicle forward.The important role of the engine crankshaft is to provide the power needed for the engine and provide continuous power for the vehicle to drive. It is also one of the core components of the engine, and its performance can directly affect the operating efficiency and stability of the engine. The important role and working principle of the engine crankshaft will be introduced in detail below. I. The important role of the engine crankshaft 1. Able to provide power: The engine crankshaft is one of the key parts of the engine, through which the up and down reciprocating motion of the piston is converted into rotational motion, so as to provide the power needed for the engine. The crankshaft can convert the stroke motion into rotational motion, and the conversion efficiency is high, which can provide continuous power for the vehicle to drive. Two. Stable engine operation: The engine crankshaft is one of the main moving parts of the engine. Whether its rotation is stable and whether it can work closely with other parts directly affects the stability and operating efficiency of the engine.Therefore, in order to maintain the efficient and stable operation of the crankshaft, precision manufacturing technology and high-quality materials can be adopted. 3. Achieve efficient combustion: The crankshaft rotates fast, which can effectively improve the thermal efficiency of the engine, so as to achieve more efficient combustion. The design of the crankshaft will also affect the volume of the combustion chamber and the airflow shape of the combustion chamber, thus affecting the efficiency and quality of combustion and further improving the efficiency of the engine. Four. Reduce friction loss: Precision matching needs to be maintained between crankshaft and crankshaft bearings to reduce friction loss. The design and material selection of the crankshaft bearing structure directly affect the working life and use effect of the engine. II. Working principle of engine crankshaft 1. The component structure of the crankshaft is generally composed of connecting rod, spindle neck, balance shaft, conical angle wheel, oil pump gear, bolt and other components. Among them, the connecting rod and the spindle neck are the two most important parts.The connecting rod connects the piston and the crankshaft, and the spindle neck is the part responsible for carrying and transmitting power. Two. When the power transmission engine is running, the crankshaft is connected to the connecting rod to rotate the drive wheel, and the rotation of the drive wheel will drive the wheel to rotate, so that the vehicle drives forward. 3. The energy conversion crankshaft can convert the up and down reciprocating motion of the piston into a rotational motion, and transfer energy to the transmission system to push the vehicle forward. In this process, the crankshaft constantly changes direction and speed, completing the mutual conversion of kinetic energy and potential energy. In a word, the engine crankshaft is one of the core components of the engine and plays a crucial role. The crankshaft can convert the up and down reciprocating motion of the piston into a rotating motion, thus pushing the vehicle forward. The design, quality and precision of the crankshaft have a direct impact on the engine's work efficiency, fuel economy, shock absorption and noise reduction, service life and the performance of the whole vehicle.The maintenance of the crankshaft needs to be strictly controlled to ensure the long-term stable operation of the engine and extend its service life.

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