#industrial terminology

• Stretcher — An instrument, manual device, or technical component used to achieve the elongation, extension, or dimensional calibration of a material through plastic deformation; an object or factor that causes elongation or driving away of an element. In certain crafting contexts, it represents a special tool used by shoemakers or leatherworkers for the controlled stretching of shoe uppers.
• Crushing — The act of crushing, grinding, or fragmenting and its result; a physical or mechanical process of breaking solid bodies or raw materials into smaller fragments or powder.
• Tapering — The act of topping or pointing and its result; a technical, biological, or geometric process by which a structure is brought to a vertex or undergoes a modification oriented toward its upper extremity (apex). In certain industrial jargons, it describes the conical finishing of an element.