1. Sheet metal parts are made by filament winding, laser cutting, heavy machining, metal bonding, metal stretching, plasma cutting, precision welding, roll forming, sheet metal bending forming, die forging and water jet cutting. Machining parts mainly include manual machining and numerical control machining.

2. Moulding: refers to the development (including design and production) of moulds (groups), referred to as moulding for short. It is to make molds and related auxiliary equipment to realize product design, sometimes called mold making or tooling.