Injection molding is a manufacturing process used to produce parts and products by injecting molten material, usually plastic, into a mold or cavity under high pressure. This leads to the melting of the material, which is then injected into the mold, where it is cooled and solidified, taking on the shape of the mold. Injection molding is a versatile process that can be used to produce complex shapes and parts with high precision and accuracy, making it a popular choice in a wide range of industries, including automotive, medical, packaging, and consumer goods.

An intrauterine contraceptive devices (IUD) is a small, plastic, and often T-shaped device that is inserted into the uterus to prevent pregnancy. Intrauterine devices may be hormonal or copper. Intrauterine devices are the most effective long-acting reversible contraceptives (LARCs)

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A blue laser diode is a type of semiconductor laser diode that emits radiation with a wavelength ranging between 360 nm and 480 nm, which is visible as blue to the human eye. Blue laser diodes are primarily based on either gallium nitride (GaN) or indium gallium nitride (InGaN) semiconductor materials. Based on the number of transmission modes, blue laser diodes are classified into single-mode blue laser diodes and multi￾mode blue laser diodes. Totally there are three transmission modes in such diodes, which are lateral, transverse, and longitudinal. When the structure of a diode is designed such that one mode can fit in the waveguide, it is termed a single-mode blue laser diode, and when it can fit more than one mode, it is known as a multi-mode blue laser diode.