Engine Valves Manufacturing Process

manufacturing process
The producing of goods or wares by manual labor or machinery, often on a large scale and with division of labor.
Manufacturing is the use of machines, tools and labor to make things for use or sale. The term may refer to a range of human activity, from handicraft to high tech, but is most commonly applied to industrial production, in which raw materials are transformed into finished goods on a large scale.
The activities involved in converting raw materials into finished goods through the application of labor and incurrence of various factory expenses.

engine
A machine with moving parts that converts power into motion
A thing that is the agent or instrument of a particular process
motor that converts thermal energy to mechanical work
something used to achieve a purpose; "an engine of change"
A railroad locomotive
locomotive: a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks

valves
(valve) device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
(valve) control consisting of a mechanical device for controlling the flow of a fluid
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
(valve) a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it